1.
Questions 1-10: COLONIZING THE AMERICAS VIA THE NORTHWEST COAST (1) It has long been accepted that the Americas were colonized by a migration of peoples from Asia slowly traveling across a land bridge called Beringia (now the Bering Strait between northeastern Asia and Alaska) during the last Ice Age. The first water craft theory about this migration was that around 11,000-12,000 years ago there was an ice-free corridor stretching from eastern Beringia to the areas of North America south of the great northern glaciers. It was this midcontinental corridor between two massive ice sheets—the Laurentide to the east and the Cordilleran to the west—that enabled the southward migration. But belief in this ice-free corridor began to crumble when paleoecologist Glen MacDonald demonstrated that some of the most important radiocarbon dates used to support the existence of an ice-free corridor were incorrect. He persuasively argued that such an ice-free corridor did not exist until much later, when the continental ice began its final retreat. According to paragraph 1, the theory that people first migrated to the Americas by way of an ice-free corridor was seriously called into question by
Correct Answer
B. The demonstration that certain previously accepted radiocarbon dates were incorrect
Explanation
The passage states that paleoecologist Glen MacDonald demonstrated that some of the radiocarbon dates used to support the existence of an ice-free corridor were incorrect. This means that the theory of an ice-free corridor was called into question because the evidence supporting it was found to be faulty. Therefore, the correct answer is "the demonstration that certain previously accepted radiocarbon dates were incorrect."
2.
(1) It has long been accepted that the Americas were colonized by a migration of peoples from Asia slowly traveling across a land bridge called Beringia (now the Bering Strait between northeastern Asia and Alaska) during the last Ice Age. The first water craft theory about this migration was that around 11,000-12,000 years ago there was an ice-free corridor stretching from eastern Beringia to the areas of North America south of the great northern glaciers. It was this midcontinental corridor between two massive ice sheets—the Laurentide to the east and the Cordilleran to the west—that enabled the southward migration. But belief in this ice-free corridor began to crumble when paleoecologist Glen MacDonald demonstrated that some of the most important radiocarbon dates used to support the existence of an ice-free corridor were incorrect. He persuasively argued that such an ice-free corridor did not exist until much later, when the continental ice began its final retreat. The word "persuasively" in the passage is closest in meaning to
Correct Answer
C. Convincingly
Explanation
The word "persuasively" in the passage indicates that Glen MacDonald presented his argument in a convincing and compelling manner. He provided strong evidence and reasoning to support his claim that the ice-free corridor did not exist until later, when the continental ice began to retreat. This suggests that his argument was logical and persuasive, leading others to believe his viewpoint. Therefore, the word "persuasively" in the passage is closest in meaning to "convincingly".
3.
(2) Support is growing for the alternative theory that people using watercraft, possibly skin boats, moved southward from Beringla along the Gulf of Alaska and then southward along the Northwest Coast of North America possibly as early as 16,000 years ago. This route would have enabled humans to enter southern areas of the Americas prior to the melting of the continental glaciers. Until the early 1970s, most archaeologists did not consider the coast a possible migration route into the Americas because geologists originally believed that during the last Ice Age the entire Northwest Coast was covered by glacial ice. It had been assumed that the ice extended westward from the Alaskan/Canadian mountains to the very edge of the continental shelf—the flat, submerged part of the continent that extends into the ocean. This would have created a barrier of ice extending from the Alaska Peninsula, through the Gulf of Alaska and southward along the Northwest Coast of North America to what is today the state of Washington. Paragraph 2 begins by presenting a theory and then goes on to
Correct Answer
D. Explain why the theory was not initially considered plausible
Explanation
Paragraph 2 explains why the theory of people using watercraft to migrate southward along the Northwest Coast of North America was not initially considered plausible. It states that archaeologists did not consider this route because geologists believed that the entire Northwest Coast was covered by glacial ice during the last Ice Age. It was assumed that the ice created a barrier extending from the Alaska Peninsula to the state of Washington. This information provides an explanation for why the theory was not initially accepted.
4.
(2) Support is growing for the alternative theory that people using watercraft, possibly skin boats, moved southward from Beringla along the Gulf of Alaska and then southward along the Northwest Coast of North America possibly as early as 16,000 years ago. This route would have enabled humans to enter southern areas of the Americas prior to the melting of the continental glaciers. Until the early 1970s, most archaeologists did not consider the coast a possible migration route into the Americas because geologists originally believed that during the last Ice Age the entire Northwest Coast was covered by glacial ice. It had been assumed that the ice extended westward from the Alaskan/Canadian mountains to the very edge of the continental shelf—the flat, submerged part of the continent that extends into the ocean. This would have created a barrier of ice extending from the Alaska Peninsula, through the Gulf of Alaska and southward along the Northwest Coast of North America to what is today the state of Washington. The phrase "prior to" is closest in meaning to
Correct Answer
A. Before
Explanation
The phrase "prior to" indicates a time that is before another event or action. In this context, it refers to the time before the melting of the continental glaciers. The explanation suggests that people using watercraft could have entered southern areas of the Americas before the glaciers melted, supporting the alternative theory of migration along the Northwest Coast of North America. Therefore, the correct answer is "before."
5.
(3) The most influential proponent of the coastal migration route has been Canadian archaeologist Knut Fladmark. He theorized that with the use of watercraft, people gradually colonized unglaciated refuges and areas along the continental shelf exposed by the lower sea level. Fladmark's hypothesis received additional support from the fact that the greatest diversity in Native American languages occurs along the west coast of the Americas, suggesting that this region has been settled the longest. Which of the sentences below best expresses the essential information in the underlined sentence in passage 3? Incorrect choices change the meaning in important ways or leave out essential information.
Correct Answer
C. The fact that the greatest diversity of Native American languages occurs along the west coast of the Americas lends strength to Fladmark's hypothesis.
Explanation
The sentence states that the greatest diversity in Native American languages occurs along the west coast of the Americas, which supports Fladmark's hypothesis. This means that the diversity of languages in this region provides evidence for the theory proposed by Fladmark. The sentence does not mention the settlement duration or the survival of languages, so options A and D are incorrect. Option B changes the meaning by stating that the west coast has been settled longer than any other region, which is not mentioned in the sentence. Therefore, the best expression of the essential information is option C.
6.
(4) More recent geologic studies documented deglaciation and the existence of icefree areas throughout major coastal areas of British Columbia, Canada, by 13,000 years ago. Research now indicates that sizable areas of southeastern Alaska along the inner continental shelf were not covered by ice toward the end of the last Ice Age. One study suggests that except for a 250-mile coastal area between southwestern British Columbia and Washington State, the Northwest Coast of North America was largely free of ice by approximately 16,000 years ago. Vast areas along the coast may have been deglaciated beginning around 16,000 years ago, possibly providing a coastal corridor for the movement of plants, animals, and humans sometime between 13,000 and 14,000 years ago. The author's purpose in paragraph 4 is to
Correct Answer
A. Indicate that a number of recent geologic studies seem to provide support for the coastal hypothesis
Explanation
The correct answer is to indicate that a number of recent geologic studies seem to provide support for the coastal hypothesis. This is evident from the passage where the author mentions "More recent geologic studies documented deglaciation and the existence of ice-free areas throughout major coastal areas of British Columbia, Canada, by 13,000 years ago" and "One study suggests that except for a 250-mile coastal area between southwestern British Columbia and Washington State, the Northwest Coast of North America was largely free of ice by approximately 16,000 years ago." These statements highlight the evidence from recent studies that support the idea of a coastal migration route.
7.
(5) The coastal hypothesis has gained increasing support in recent years because the remains of large land animals, such as caribou and brown bears, have been found in southeastern Alaska dating between 10,000 and 12,500 years ago. This is the time period in which most scientists formerly believed the area to be inhospitable for humans. It has been suggested that if the environment were capable of supporting breeding populations of bears, there would have been enough food resources to support humans. Fladmark and others believe that the first human colonization of America occurred by boat along the Northwest Coast during the very late Ice Age, possibly as early as 14,000 years ago. The most recent geologic evidence indicates that it may have been possible for people to colonize ice-free regions along the continental shelf that were still exposed by the lower sea level between 13,000 and 14,000 years ago. According to paragraph 5, the discovery of the remains of large land animals supports the coastal hypothesis by providing evidence that
Correct Answer
C. Humans probably would have been able to find enough resources along the coastal corridor
Explanation
The discovery of the remains of large land animals in southeastern Alaska dating between 10,000 and 12,500 years ago supports the coastal hypothesis because it suggests that humans were able to find enough resources along the coastal corridor. If the environment was capable of supporting breeding populations of bears, there would have been enough food resources to support humans as well. This finding contradicts the previous belief that the area was inhospitable for humans during that time period. Therefore, the discovery of these remains provides evidence that humans were able to adapt to coastal environments and find enough resources to survive.
8.
(5) The coastal hypothesis has gained increasing support in recent years because the remains of large land animals, such as caribou and brown bears, have been found in southeastern Alaska dating between 10,000 and 12,500 years ago. This is the time period in which most scientists formerly believed the area to be inhospitable for humans. It has been suggested that if the environment were capable of supporting breeding populations of bears, there would have been enough food resources to support humans. Fladmark and others believe that the first human colonization of America occurred by boat along the Northwest Coast during the very late Ice Age, possibly as early as 14,000 years ago. The most recent geologic evidence indicates that it may have been possible for people to colonize ice-free regions along the continental shelf that were still exposed by the lower sea level between 13,000 and 14,000 years ago. The word "inhospitable" in the passage is closest in meaning to
Correct Answer
B. Not suitable
Explanation
The word "inhospitable" in the passage refers to the belief that the area was not suitable for humans. This means that the environment was not conducive or favorable for human habitation.
9.
(5) The coastal hypothesis has gained increasing support in recent years because the remains of large land animals, such as caribou and brown bears, have been found in southeastern Alaska dating between 10,000 and 12,500 years ago. This is the time period in which most scientists formerly believed the area to be inhospitable for humans. It has been suggested that if the environment were capable of supporting breeding populations of bears, there would have been enough food resources to support humans. Fladmark and others believe that the first human colonization of America occurred by boat along the Northwest Coast during the very late Ice Age, possibly as early as 14,000 years ago. The most recent geologic evidence indicates that it may have been possible for people to colonize ice-free regions along the continental shelf that were still exposed by the lower sea level between 13,000 and 14,000 years ago. According to paragraph 5, the most recent geologic research provides support for a first colonization of America dating as far back as
Correct Answer
B. 14,000 years ago
Explanation
The most recent geologic research provides support for a first colonization of America dating as far back as 14,000 years ago. This is indicated by the statement that "The most recent geologic evidence indicates that it may have been possible for people to colonize ice-free regions along the continental shelf that were still exposed by the lower sea level between 13,000 and 14,000 years ago." This suggests that humans could have colonized America by boat along the Northwest Coast during the very late Ice Age, possibly as early as 14,000 years ago.
10.
(6) The coastal hypothesis suggests an economy based on marine mammal hunting, saltwater fishing, shellfish gathering, and the use of watercraft. Because of the barrier of ice to the east, the Pacific Ocean to the west, and populated areas to the north, there may have been a greater impetus for people to move in a southerly direction. The word "impetus" in the passage is closest in meaning to
Correct Answer
D. Incentive
Explanation
The word "impetus" in the passage suggests that there may have been a strong motivation or driving force for people to move in a southerly direction. This motivation could be seen as an "incentive" for people to leave their current location and move towards the south.
11.
Questions 11-20: REFLECTION IN TEACHING(1) Teachers, it is thought, benefit from the practice of reflection, the conscious act of thinking deeply about and carefully examining the interactions and events within their own classrooms. Educators T. Wildman and J. Niles (1987) describe a scheme for developing reflective practice in experienced teachers. This was justified by the view that reflective practice could help teachers to feel more intellectually involved in their role and work in teaching and enable them to cope with the paucity of scientific fact and the uncertainty of knowledge in the discipline of teaching. The word "justified" in the passage is closest in meaning to
Correct Answer
A. Supported
Explanation
The word "justified" in the passage is closest in meaning to "supported". This means that the scheme for developing reflective practice in experienced teachers was backed or upheld by the belief that it could help teachers feel more intellectually involved in their role and cope with the lack of scientific fact and uncertainty in teaching.
12.
(1) Teachers, it is thought, benefit from the practice of reflection, the conscious act of thinking deeply about and carefully examining the interactions and events within their own classrooms. Educators T. Wildman and J. Niles (1987) describe a scheme for developing reflective practice in experienced teachers. This was justified by the view that reflective practice could help teachers to feel more intellectually involved in their role and work in teaching and enable them to cope with the paucity of scientific fact and the uncertainty of knowledge in the discipline of teaching. According to paragraph 1, it was believed that reflection could help teachers
Correct Answer
B. Strengthen their intellectual connection to their work
Explanation
According to the passage, reflection was believed to help teachers strengthen their intellectual connection to their work. This means that by engaging in reflection, teachers would feel more intellectually involved in their role and work in teaching. Reflection would enable teachers to think deeply about and carefully examine the interactions and events within their own classrooms, thus enhancing their understanding and connection to their profession.
13.
(2) Wildman and Niles were particularly interested in investigating the conditions under which reflection might flourish—a subject on which there is little guidance in the literature. They designed an experimental strategy for a group of teachers in Virginia and worked with 40 practicing teachers over several years. They were concerned that many would be "drawn to these new, refreshing conceptions of teaching only to find that the void between the abstractions and the realities of teacher reflection is too great to bridge. Reflection on a complex task such as teaching is not easy." The teachers were taken through a program of talking about teaching events, moving on to reflecting about specific issues in a supported, and later an independent, manner. The word "flourish" in the passage is closest in meaning to
Correct Answer
C. Succeed
Explanation
The word "flourish" in the passage is closest in meaning to "succeed". This is because the passage states that Wildman and Niles were interested in investigating the conditions under which reflection might flourish. When something flourishes, it thrives and succeeds. Therefore, "succeed" is the most appropriate synonym for "flourish" in this context.
14.
(2) Wildman and Niles were particularly interested in investigating the conditions under which reflection might flourish—a subject on which there is little guidance in the literature. They designed an experimental strategy for a group of teachers in Virginia and worked with 40 practicing teachers over several years. They were concerned that many would be "drawn to these new, refreshing conceptions of teaching only to find that the void between the abstractions and the realities of teacher reflection is too great to bridge. Reflection on a complex task such as teaching is not easy." The teachers were taken through a program of talking about teaching events, moving on to reflecting about specific issues in a supported, and later an independent, manner. All of the following are mentioned about the experimental strategy described in paragraph 2 EXCEPT:
Correct Answer
D. It involved having teachers record in writing their reflections about teaching.
Explanation
The passage mentions that the teachers were taken through a program of talking about teaching events and reflecting about specific issues in a supported and later an independent manner. However, there is no mention of the teachers recording their reflections in writing. Therefore, the correct answer is "It involved having teachers record in writing their reflections about teaching."
15.
(3) Wildman and Niles observed that systematic reflection on teaching required a sound ability to understand classroom events in an objective manner. They describe the initial understanding in the teachers with whom they were working as being "utilitarian … and not rich or detailed enough to drive systematic reflection." Teachers rarely have the time or opportunities to view their own or the teaching of others in an objective manner. Further observation revealed the tendency of teachers to evaluate events rather than review the contributory factors in a considered manner by, in effect, standing outside thesituation. The word "objective" in the passage is closest in meaning to
Correct Answer
A. Unbiased
Explanation
The word "objective" in the passage is closest in meaning to "unbiased". This is because the passage mentions that teachers need to understand classroom events in an objective manner, which means they need to view them without any bias or personal opinions. The passage also contrasts this objective understanding with the tendency of teachers to evaluate events, implying that this evaluation is not unbiased or objective. Therefore, "unbiased" is the most appropriate synonym for "objective" in this context.
16.
(3) Wildman and Niles observed that systematic reflection on teaching required a sound ability to understand classroom events in an objective manner. They describe the initial understanding in the teachers with whom they were working as being "utilitarian … and not rich or detailed enough to drive systematic reflection." Teachers rarely have the time or opportunities to view their own or the teaching of others in an objective manner. Further observation revealed the tendency of teachers to evaluate events rather than review the contributory factors in a considered manner by, in effect, standing outside thesituation. According to paragraph 3, what did the teachers working with Wildman and Niles often fall to do when they attempted to practice reflection?
Correct Answer
C. Examine thoughtfully the possible causes of events in their classrooms
Explanation
The teachers working with Wildman and Niles often failed to examine thoughtfully the possible causes of events in their classrooms when they attempted to practice reflection. The initial understanding of the teachers was described as utilitarian and not rich or detailed enough to drive systematic reflection. They tended to evaluate events rather than review the contributory factors in a considered manner by standing outside the situation. This suggests that the teachers were not effectively analyzing and considering the possible causes of the events in their classrooms during reflection.
17.
(4) Helping this group of teachers to revise their thinking about classroom events became central. This process took time and patience and effective trainers. The researchers estimate that the initial training of the teachers to view events objectively took between 20 and 30 hours, with the same number of hours again being required to practice the skills of reflection. How is paragraph 4 related to other aspects of the discussion of reflection in the passage?
Correct Answer
A. It describes and comments on steps taken to overcome problems identified earlier in the passage.
Explanation
The correct answer is "It describes and comments on steps taken to overcome problems identified earlier in the passage." The paragraph discusses the process of helping teachers revise their thinking about classroom events, which was identified as a problem earlier in the passage. It mentions that this process took time, patience, and effective trainers, indicating the steps taken to overcome the identified problems.
18.
(5) Wildman and Niles identify three principles that facilitate reflective practice in a teaching situation. The first is support from administrators in an education system, enabling teachers to understand the requirements of reflective practice and how it relates to teaching students. The second is the availability of sufficient time and space. The teachers in the program described how they found it difficult to put aside the immediate demands of others in order to give themselves the time they needed to develop their reflective skills. The third is the development of a collaborative environment with support from other teachers. Support and encouragement were also required to help teachers in the program cope with aspects of their professional life with which they were not comfortable. Wildman and Niles make a summary comment "Perhaps the most important thing we learned is the idea of the teacher-as-reflective-practitioner will not happen simply because it is a good or even compelling idea." It can be inferred from paragraph 5 that the teachers working with Wildman and Niles held which of the following beliefs concerning reflection?
Correct Answer
D. Teachers can afford to engage in reflection only after other needs have been met.
Explanation
The teachers working with Wildman and Niles believed that they could only engage in reflection after fulfilling their immediate needs. They found it difficult to set aside the demands of others in order to give themselves the time they needed for reflective practice. This suggests that they believed reflection was a secondary priority, to be pursued only after addressing other pressing needs.
19.
(6) The work of Wildman and Niles suggests the importance of recognizing some of the difficulties of instituting reflective practice. Others have noted this, making a similar point about the teaching profession's cultural inhibitions about reflective practice. Zeichner and Liston (1987) point out the inconsistency between the role of the teacher as a (reflective) professional decision maker and the more usual role of the teacher as a technician, putting into practice the ideas of others. More basic than the cultural issues is the matter of motivation. Becoming a reflective practitioner requires extra work (Jaworski,1993) and has only vaguely defined goals with, perhaps, little initially perceivable reward and the threat of vulnerability. Few have directly questioned what might lead a teacher to want to become reflective. Apparently, the most obvious reason for teachers to work toward reflective practice is that teacher educators think it is a good thing. There appear to be many unexplored matters about the motivation to reflect—for example, the value of externally motivated reflection as opposed to that of teachers who might reflect by habit. According to paragraph 6, teachers may be discouraged from reflecting because
Correct Answer
B. The benefits of reflection may not be apparent immediately
Explanation
Teachers may be discouraged from reflecting because the benefits of reflection may not be apparent immediately. The passage states that reflective practice requires extra work and has vaguely defined goals, with little initially perceivable reward. This lack of immediate benefits and the potential threat of vulnerability may deter teachers from engaging in reflective practice. The passage also mentions that there are many unexplored matters about the motivation to reflect, indicating that teachers may not fully understand the value of reflection.
20.
(6) The work of Wildman and Niles suggests the importance of recognizing some of the difficulties of instituting reflective practice. Others have noted this, making a similar point about the teaching profession's cultural inhibitions about reflective practice. Zeichner and Liston (1987) point out the inconsistency between the role of the teacher as a (reflective) professional decision maker and the more usual role of the teacher as a technician, putting into practice the ideas of others. More basic than the cultural issues is the matter of motivation. Becoming a reflective practitioner requires extra work (Jaworski,1993) and has only vaguely defined goals with, perhaps, little initially perceivable reward and the threat of vulnerability. Few have directly questioned what might lead a teacher to want to become reflective. Apparently, the most obvious reason for teachers to work toward reflective practice is that teacher educators think it is a good thing. There appear to be many unexplored matters about the motivation to reflect—for example, the value of externally motivated reflection as opposed to that of teachers who might reflect by habit. Which of the sentences below best expresses the essential information in the underlined sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.
Correct Answer
C. Many aspects of the motivation to reflect have not been studied, including the comparative benefits of externally motivated and habitual reflection among teachers.
Explanation
The passage discusses the difficulties of instituting reflective practice among teachers and highlights the inconsistency between the role of a teacher as a reflective professional decision maker and the more common role of a teacher as a technician. It also mentions the matter of motivation, stating that becoming a reflective practitioner requires extra work and has vaguely defined goals with little initially perceivable reward and the threat of vulnerability. The passage then suggests that there are many unexplored matters about the motivation to reflect, including the value of externally motivated reflection compared to habitual reflection among teachers. Therefore, the sentence "Many aspects of the motivation to reflect have not been studied, including the comparative benefits of externally motivated and habitual reflection among teachers" best expresses the essential information in the underlined sentence.
21.
Questions 21-30: THE ARRIVAL OF PLANT LIFE IN HAWAII (1) When the Hawaiian Islands emerged from the sea as volcanoes, starting about five million years ago, they were far removed from other landmasses. Then, as blazing sunshine alternated with drenching rains, the harsh, barren surfaces of the black rocks slowly began to soften. Winds brought a variety of life-forms.(2) Spores light enough to float on the breezes were carried thousands of miles from more ancient lands and deposited at random across the bare mountain flanks. A few of these spores found a toehold on the dark, forbidding rocks and grew and began to work their transformation upon the land. Lichens were probably the first successful flora. These are not single individual plants: each one is a symbiotic combination of an alga and a fungus. The algae capture the Sun's energy by photosynthesis and store it in organic molecules. The fungi absorb moisture and mineral salts from the rocks, passing these on in waste products that nourish algae. It is significant that the earliest living things that built communities on these islands are examples of symbiosis, a phenomenon that depends upon the close cooperation of two or more forms of life and a principle that is very important in island communities. The phrase "at random" in the passage is closest in meaning to
Correct Answer
D. Without a definite pattern
Explanation
The phrase "at random" in the passage refers to the spores being deposited across the bare mountain flanks without a definite pattern. This means that the spores were not deliberately or systematically placed, but rather scattered in a haphazard or unpredictable manner. The word "random" implies that there was no specific order or arrangement to how the spores were distributed, suggesting a lack of pattern or organization.
22.
(1) When the Hawaiian Islands emerged from the sea as volcanoes, starting about five million years ago, they were far removed from other landmasses. Then, as blazing sunshine alternated with drenching rains, the harsh, barren surfaces of the black rocks slowly began to soften. Winds brought a variety of life-forms.(2) Spores light enough to float on the breezes were carried thousands of miles from more ancient lands and deposited at random across the bare mountain flanks. A few of these spores found a toehold on the dark, forbidding rocks and grew and began to work their transformation upon the land. Lichens were probably the first successful flora. These are not single individual plants: each one is a symbiotic combination of an alga and a fungus. The algae capture the Sun's energy by photosynthesis and store it in organic molecules. The fungi absorb moisture and mineral salts from the rocks, passing these on in waste products that nourish algae. It is significant that the earliest living things that built communities on these islands are examples of symbiosis, a phenomenon that depends upon the close cooperation of two or more forms of life and a principle that is very important in island communities. Which of the sentences below best expresses the essential information in the underlined sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.
Correct Answer
C. The first organisms on these islands worked together closely in a relationship known as symbiosis, which is particularly important on islands.
Explanation
The passage explains that the earliest living things on the Hawaiian Islands were examples of symbiosis, a close cooperation between two or more forms of life. This relationship, known as symbiosis, is particularly important in island communities. The correct answer accurately conveys this information by stating that the first organisms on the islands worked together closely in a relationship known as symbiosis, which is particularly important on islands.
23.
(2) Spores light enough to float on the breezes were carried thousands of miles from more ancient lands and deposited at random across the bare mountain flanks. A few of these spores found a toehold on the dark, forbidding rocks and grew and began to work their transformation upon the land. Lichens were probably the first successful flora. These are not single individual plants: each one is a symbiotic combination of an alga and a fungus. The algae capture the Sun's energy by photosynthesis and store it in organic molecules. The fungi absorb moisture and mineral salts from the rocks, passing these on in waste products that nourish algae. It is significant that the earliest living things that built communities on these islands are examples of symbiosis, a phenomenon that depends upon the close cooperation of two or more forms of life and a principle that is very important in island communities. It can be inferred from paragraph 2 that the fungi in lichens benefit from their symbiotic relationship with algae in what way?
Correct Answer
A. The algae help the fungi meet some of their energy needs.
Explanation
The passage states that the algae in lichens capture the Sun's energy through photosynthesis and store it in organic molecules. The fungi, on the other hand, absorb moisture and mineral salts from the rocks and pass them on to the algae in waste products. This suggests that the fungi benefit from the symbiotic relationship with algae by obtaining some of their energy needs from the stored energy in the organic molecules produced by the algae. Therefore, the correct answer is that the algae help the fungi meet some of their energy needs.
24.
(3) Lichens helped to speed the decomposition of the hard rock surfaces, preparing a soft bed of soil that was abundantly supplied with minerals that had been carried in the molten rock from the bowels of Earth. Now, other forms of life could take hold: ferns and mosses (two of the most ancient types of land plants) that flourish even in rock crevices. These plants propagate by producing spores—tiny fertilized cells that contain all the instructions for making a new plant—but the spores are unprotected by any outer coating and carry no supply of nutrient. Vast numbers of them fall on the ground beneath the mother plants. Sometimes they are carried farther afield by water or by wind. But only those few spores that settle down in very favorable locations can start new life; the vast majority fall on barren ground. By force of sheer numbers, however, the mosses and ferns reached Hawaii, survived, and multiplied. Some species developed great size, becoming tree ferns that even now grow in the Hawaiian forests. The word "abundantly" in the passage is closest in meaning to
Correct Answer
B. Plentifully
Explanation
The word "abundantly" in the passage is closest in meaning to "plentifully". This means that there was a large amount or supply of minerals in the soil that had been carried in the molten rock from the Earth's interior. The lichens helped speed up the decomposition of the hard rock surfaces, creating a soft bed of soil that was rich in minerals. This abundance of minerals allowed other forms of life, such as ferns and mosses, to take hold and flourish in rock crevices.
25.
(3) Lichens helped to speed the decomposition of the hard rock surfaces, preparing a soft bed of soil that was abundantly supplied with minerals that had been carried in the molten rock from the bowels of Earth. Now, other forms of life could take hold: ferns and mosses (two of the most ancient types of land plants) that flourish even in rock crevices. These plants propagate by producing spores—tiny fertilized cells that contain all the instructions for making a new plant—but the spores are unprotected by any outer coating and carry no supply of nutrient. Vast numbers of them fall on the ground beneath the mother plants. Sometimes they are carried farther afield by water or by wind. But only those few spores that settle down in very favorable locations can start new life; the vast majority fall on barren ground. By force of sheer numbers, however, the mosses and ferns reached Hawaii, survived, and multiplied. Some species developed great size, becoming tree ferns that even now grow in the Hawaiian forests. The word "propagate" in the passage is closest in meaning to
Correct Answer
A. Multiply
Explanation
The word "propagate" in the passage is closest in meaning to "multiply." This is because "propagate" refers to the process of reproducing or increasing in number, which is synonymous with multiplying.
26.
(3) Lichens helped to speed the decomposition of the hard rock surfaces, preparing a soft bed of soil that was abundantly supplied with minerals that had been carried in the molten rock from the bowels of Earth. Now, other forms of life could take hold: ferns and mosses (two of the most ancient types of land plants) that flourish even in rock crevices. These plants propagate by producing spores—tiny fertilized cells that contain all the instructions for making a new plant—but the spores are unprotected by any outer coating and carry no supply of nutrient. Vast numbers of them fall on the ground beneath the mother plants. Sometimes they are carried farther afield by water or by wind. But only those few spores that settle down in very favorable locations can start new life; the vast majority fall on barren ground. By force of sheer numbers, however, the mosses and ferns reached Hawaii, survived, and multiplied. Some species developed great size, becoming tree ferns that even now grow in the Hawaiian forests. According to paragraph 3, what was the relationship between lichens and ferns in the development of plant life on Hawaii?
Correct Answer
A. Ferns were able to grow because lichens created suitable soil. It is broken down quickly in the intestine.
Explanation
The correct answer is: Ferns were able to grow because lichens created suitable soil. Lichens helped to speed up the decomposition of hard rock surfaces, creating a soft bed of soil that was rich in minerals. This prepared the ground for other forms of life, including ferns, to take hold and thrive.
27.
(4) Many millions of years after ferns evolved (but long before the Hawaiian Islands were born from the sea), another kind of flora evolved on Earth: the seed-bearing plants. This was a wonderful biological invention. The seed has an outer coating that surrounds the genetic material of the new plant, and inside this covering is a concentrated supply of nutrients. Thus, the seed's chances of survival are greatly enhanced over those of the naked spore. One type of seed-bearing plant, the angiosperm, includes all forms of blooming vegetation. In the angiosperm the seeds are wrapped in an additional layer of covering. Some of these coats are hard—like the shell of a nut—for extra protection. Some are soft and tempting, like a peach or a cherry. In some angiosperms the seeds are equipped with gossamer wings, like the dandelion and milkweed seeds. These new characteristics offered better ways for the seeds to move to new habitats. They could travel through the air, float in water, and lie dormant for many months. The word “This” in the passage refers to
Correct Answer
D. The development of plants that produce seeds
Explanation
The word "this" in the passage refers to the development of plants that produce seeds. The passage discusses the evolution of seed-bearing plants, which was described as a "wonderful biological invention." It explains that seeds have an outer coating and a concentrated supply of nutrients, which greatly enhance their chances of survival compared to naked spores. The passage also mentions the different characteristics of angiosperms, such as hard or soft coverings, gossamer wings, and the ability to travel through air or water. Therefore, "this" refers to the development and characteristics of plants that produce seeds.
28.
(4) Many millions of years after ferns evolved (but long before the Hawaiian Islands were born from the sea), another kind of flora evolved on Earth: the seed-bearing plants. This was a wonderful biological invention. The seed has an outer coating that surrounds the genetic material of the new plant, and inside this covering is a concentrated supply of nutrients. Thus, the seed's chances of survival are greatly enhanced over those of the naked spore. One type of seed-bearing plant, the angiosperm, includes all forms of blooming vegetation. In the angiosperm the seeds are wrapped in an additional layer of covering. Some of these coats are hard—like the shell of a nut—for extra protection. Some are soft and tempting, like a peach or a cherry. In some angiosperms the seeds are equipped with gossamer wings, like the dandelion and milkweed seeds. These new characteristics offered better ways for the seeds to move to new habitats. They could travel through the air, float in water, and lie dormant for many months. Why does the author mention "a nut," "a peach," and "a cherry"?
Correct Answer
D. To illustrate the variety of coverings among angiosperm seeds
Explanation
The author mentions "a nut," "a peach," and "a cherry" to illustrate the variety of coverings among angiosperm seeds. This is evident from the sentence that states, "Some of these coats are hard—like the shell of a nut—for extra protection. Some are soft and tempting, like a peach or a cherry." By providing these examples, the author highlights that angiosperm seeds can have different types of coverings, ranging from hard shells to soft and tempting coatings. This emphasizes the diversity in the characteristics of angiosperm seeds.
29.
(4) Many millions of years after ferns evolved (but long before the Hawaiian Islands were born from the sea), another kind of flora evolved on Earth: the seed-bearing plants. This was a wonderful biological invention. The seed has an outer coating that surrounds the genetic material of the new plant, and inside this covering is a concentrated supply of nutrients. Thus, the seed's chances of survival are greatly enhanced over those of the naked spore. One type of seed-bearing plant, the angiosperm, includes all forms of blooming vegetation. In the angiosperm the seeds are wrapped in an additional layer of covering. Some of these coats are hard—like the shell of a nut—for extra protection. Some are soft and tempting, like a peach or a cherry. In some angiosperms the seeds are equipped with gossamer wings, like the dandelion and milkweed seeds. These new characteristics offered better ways for the seeds to move to new habitats. They could travel through the air, float in water, and lie dormant for many months. The word "dormant" in the passage is closest in meaning to
Correct Answer
B. Inactive
Explanation
In the passage, it is mentioned that the seeds of angiosperms can lie dormant for many months. The word "dormant" means inactive or in a state of rest. This implies that the seeds are not actively growing or developing during this period. Therefore, the closest meaning to "dormant" in the passage is "inactive".
30.
(5) Plants with large, buoyant seeds—like coconuts—drift on ocean currents and are washed up on the shores. Remarkably resistant to the vicissitudes of ocean travel, they can survive prolonged immersion in saltwater. When they come to rest on warm beaches and the conditions are favorable, the seed coats soften. Nourished by their imported supply of nutrients, the young plants push out their roots and establish their place in the sun.(6) By means of these seeds, plants spread more widely to new locations, even to isolated islands like the Hawaiian archipelago, which lies more than 2,000 miles west of California and 3,500 miles east of Japan. The seeds of grasses, flowers, and blooming trees made the long trips to these islands. (Grasses are simple forms of angiosperms that bear their encapsulated seeds on long stalks.) In a surprisingly short time, angiosperms filled many of the land areas on Hawaii that had been bare. According to paragraph 5, a major reason that coconuts can establish themselves in distant locations is that their seeds can
Correct Answer
B. Float and survive for long periods in ocean water
Explanation
The correct answer is "float and survive for long periods in ocean water." According to the passage, plants with large, buoyant seeds like coconuts can drift on ocean currents and survive prolonged immersion in saltwater. This allows them to be carried to distant locations and eventually establish themselves on warm beaches. The passage does not mention exposure to heat on island beaches, the use of saltwater for maintenance and growth, or the maintenance of hard, protective coats after growing roots.