1.
Colorblindness
A Myths related to the
causes and symptoms of "colorblindness" abound throughout the world.
The term itself is misleading, since it is extremely rare for anyone to have a
complete lack of color perception. By looking into the myths related to color
blindness, one can learn many facts about the structure and genetics o the
human eye. It is a myth that colorblind people see the world as if it were a
black and white movie. There are very few cases of complete colorblindness.
Those who have a complete lack of color perception are referred to as
monochromatics, and usually have a serious problem with their overall vision as
well as an inability to see colors. The fact is that in most cases of
colorblindness, there are only certain shades that a person cannot distinguish
between. These people are said to be dichromatic. They may not be able to tell
the difference between red and green, or orange and yellow. A person with
normal color vision has what is called trichromatic vision. The difference
between the three levels of color perception have to do with the cones in the
human eye. A normal human eye has three cones located inside the retina: the
red cone, the green cone, and the yellow cone. Each cone contains a specific
pigment whose function is to absorb the light of these colors and the
combinations of them. People with trichromatic vision have all three cones in
working order. When one of the three cones does not function properly,
dichromatic vision occurs.
Question: People who see color normally are called
Correct Answer
C. Tichromatic
Explanation
(C) The second to the last sentence of Paragraph A states that: "People with trichromatic vision have all three cones in working order."
2.
Colorblindness
C It is true that all
babies are born colorblind. A baby's cones do not begin to differentiate
between many different colors until he is approximately four months old. This
is why many of the modern toys for very young babies consist of black and white
patterns or primary colors, rather than traditional soft pastels. However, some
current research points to the importance of developing an infant's color
visual system. In 2004, Japanese researcher Yoichi Sugita of the Neuroscience
Research Institute performed an experiment that would suggest that color vision
deficiency isn't entirely genetic. In his experiment, he subjected a group of
baby monkeys to monochromatic lighting for one year. He later compared their
vision to normal monkey who had experienced the colorful world outdoors. It was
found that the test monkeys were unable to perform the color-matching tasks
that the normal monkeys could. Nevertheless, most cases of colorblindness are
attributed to genetic factors that are present at birth.
Question:
Children usually begin to see a variety of colors by the age of
Correct Answer
B. Four months
Explanation
(B) The second sentence in Paragraph C states that: "A baby's cones do not begin to differentiate between many different colors until he is approximately four months old."
3.
Colorblindness
D Part of the reason there
are so many inconsistencies related to colorblindness, or "color vision
deficiency" as it is called in the medical world, is that it is difficult
to know exactly which colors each human can see. Children are taught from a
very young age that an apple is red. Naming colors allows children to associate
a certain shade with a certain name, regardless of a color vision deficiency.
Someone who never takes a color test can go through life thinking that what
they see as red is called green. Children are generally tested for
colorblindness at about four years of age. The Ishihara Test is the most
common, though it is highly criticized' because it requires that children have
the ability to recognize numerals. In the Ishihara Test, a number made up of
colored dots is hidden inside a series of dots of a different shade. Those with
normal vision can distinguish the number from the background, while those with
color vision deficiency will only see the dots.Question:
Children
who take the Ishihara Test must be able to
Correct Answer
C. Read numbers
Explanation
(C) Paragraph R states the main downfall of the Ishihara Test: "The Ishihara Test is the most common, though it is highly criticized because it requires that children have the ability to recognize numerals."
4.
Colorblindness
B Some people believe that
only men can be colorblind. This is also a myth, though it is not completely
untrue. In an average population, 8% of males exhibit some form of
colorblindness, while only 0.5% of women do. While there may be some truth to
the idea that more men have trouble matching their clothing than women, the
reason that color vision deficiency is predominant in males has nothing to do
with fashion. The fact is that the gene for color blindness is located on the X
chromosome, which men only have one of. Females have two X chromosomes, and if
one carries the defective gene, the other one naturally compensates. Therefore,
the only way for a female to inherit colorblindness is for both of her X
chromosomes to carry the defective gene. This is why the incidence of color
deficiency is sometimes more prevalent in extremely small societies that have a
limited gene pool.Question: Colorblindness is predominant in men because of
Correct Answer
A. Lack of another X chromosome to compensate for the deficiency
Explanation
Colorblindness is more predominant in men because the gene for color blindness is located on the X chromosome, and men only have one X chromosome. Females have two X chromosomes, and if one carries the defective gene, the other one can compensate for it. Therefore, for a female to inherit colorblindness, both of her X chromosomes must carry the defective gene. This explains why color deficiency is more prevalent in men compared to women.
5.
Colorblindness
A Myths related to the
causes and symptoms of "colorblindness" abound throughout the world.
The term itself is misleading, since it is extremely rare for anyone to have a
complete lack of color perception. By looking into the myths related to color
blindness, one can learn many facts about the structure and genetics o the
human eye. It is a myth that colorblind people see the world as if it were a
black and white movie. There are very few cases of complete colorblindness.
Those who have a complete lack of color perception are referred to as
monochromatics, and usually have a serious problem with their overall vision as
well as an inability to see colors. The fact is that in most cases of
colorblindness, there are only certain shades that a person cannot distinguish
between. These people are said to be dichromatic. They may not be able to tell
the difference between red and green, or orange and yellow. A person with
normal color vision has what is called trichromatic vision. The difference
between the three levels of color perception have to do with the cones in the
human eye. A normal human eye has three cones located inside the retina: the
red cone, the green cone, and the yellow cone. Each cone contains a specific
pigment whose function is to absorb the light of these colors and the
combinations of them. People with trichromatic vision have all three cones in
working order. When one of the three cones does not function properly,
dichromatic vision occurs.Question: What is the main idea of paragraph A?
Correct Answer
B. Discusses what most people think color blindness is and what it really is
Explanation
The main idea of paragraph A is to discuss what most people think color blindness is and what it really is. The paragraph explains that the term "colorblindness" is misleading because it is rare for someone to have a complete lack of color perception. It goes on to debunk the myth that colorblind people see the world in black and white, and explains that most cases of colorblindness involve an inability to distinguish between certain shades. The paragraph also introduces the terms monochromatic, dichromatic, and trichromatic to further explain the different levels of color perception.
6.
Colorblindness
B Some people believe that
only men can be colorblind. This is also a myth, though it is not completely
untrue. In an average population, 8% of males exhibit some form of
colorblindness, while only 0.5% of women do. While there may be some truth to
the idea that more men have trouble matching their clothing than women, the
reason that color vision deficiency is predominant in males has nothing to do
with fashion. The fact is that the gene for color blindness is located on the X
chromosome, which men only have one of. Females have two X chromosomes, and if
one carries the defective gene, the other one naturally compensates. Therefore,
the only way for a female to inherit colorblindness is for both of her X
chromosomes to carry the defective gene. This is why the incidence of color
deficiency is sometimes more prevalent in extremely small societies that have a
limited gene pool.Question: What is the main idea of paragraph B?
Correct Answer
C. Discusses the fact that men are more prone to colorblindness than women, and states the genetic reasons why this is the case
Explanation
The main idea of paragraph B is to discuss the fact that men are more prone to colorblindness than women and to state the genetic reasons behind this. It explains that color vision deficiency is more common in males because the gene for color blindness is located on the X chromosome, of which men only have one. On the other hand, females have two X chromosomes, and if one carries the defective gene, the other compensates for it. Therefore, for a female to inherit colorblindness, both of her X chromosomes must carry the defective gene.
7.
Colorblindness
C It is true that all
babies are born colorblind. A baby's cones do not begin to differentiate
between many different colors until he is approximately four months old. This
is why many of the modern toys for very young babies consist of black and white
patterns or primary colors, rather than traditional soft pastels. However, some
current research points to the importance of developing an infant's color
visual system. In 2004, Japanese researcher Yoichi Sugita of the Neuroscience
Research Institute performed an experiment that would suggest that color vision
deficiency isn't entirely genetic. In his experiment, he subjected a group of
baby monkeys to monochromatic lighting for one year. He later compared their
vision to normal monkey who had experienced the colorful world outdoors. It was
found that the test monkeys were unable to perform the color-matching tasks
that the normal monkeys could. Nevertheless, most cases of colorblindness are
attributed to genetic factors that are present at birth.Question: What is paragraph C's main idea?
Correct Answer
D. Discusses the fact that babies are all born colorblind and that they do not develop the ability to see colors until they are a few months old and the possibility that infants may require a colorful environment in order to develop proper color vision.
Explanation
Paragraph C's main idea is that it discusses the fact that babies are all born colorblind and that they do not develop the ability to see colors until they are a few months old. It also mentions the possibility that infants may require a colorful environment in order to develop proper color vision. The paragraph supports this idea by mentioning the research conducted by Yoichi Sugita, which suggests that color vision deficiency may not be entirely genetic and that exposure to a colorful world is important for the development of an infant's color visual system.
8.
Colorblindness
D Part of the reason there
are so many inconsistencies related to colorblindness, or "color vision
deficiency" as it is called in the medical world, is that it is difficult
to know exactly which colors each human can see. Children are taught from a
very young age that an apple is red. Naming colors allows children to associate
a certain shade with a certain name, regardless of a color vision deficiency.
Someone who never takes a color test can go through life thinking that what
they see as red is called green. Children are generally tested for
colorblindness at about four years of age. The Ishihara Test is the most
common, though it is highly criticized' because it requires that children have
the ability to recognize numerals. In the Ishihara Test, a number made up of
colored dots is hidden inside a series of dots of a different shade. Those with
normal vision can distinguish the number from the background, while those with
color vision deficiency will only see the dots.Question: What is the main idea of paragraph D?
Correct Answer
A. Discusses the reasons why colorblindness is difficult to diagnose and it also discusses the Ishihara Test, which distinguishes those who are colorblind from those who have normal color vision.
Explanation
The main idea of paragraph D is that it discusses the reasons why colorblindness is difficult to diagnose and it also discusses the Ishihara Test, which distinguishes those who are colorblind from those who have normal color vision. It mentions the inconsistencies related to colorblindness and the difficulty in knowing exactly which colors each human can see. It also mentions that the Ishihara Test is the most common test for colorblindness, but it is criticized for requiring the ability to recognize numerals.
9.
Colorblindness
E While many of the myths
related to colorblindness have been busted by modern science, there are still a
few remaining beliefs that require more research in order to be labeled as
folklore. For example, there is a long-standing belief that colorblindness can
aid military soldiers because it gives them the ability to see through
camouflage. Another belief is that everyone becomes colorblind in an emergency
situation. The basis of this idea is that a catastrophic event can overwhelm
the brain, causing it to utilize only those receptors needed to perform vital
tasks. In general, identifying color is not considered an essential task in a
life or death situation.Question: What is paragraph E trying to discuss?
Correct Answer
B. Mentions two beliefs about colorblindness that haven't been proven as myths: that colorblindness can aid military soldiers and that everyone is colorblind in an emergency.
Explanation
Paragraph E is discussing two beliefs about colorblindness that have not been proven as myths. These beliefs are that colorblindness can aid military soldiers by allowing them to see through camouflage, and that everyone becomes colorblind in an emergency situation. The paragraph does not mention the conclusion of the article, the debunking of long-standing myths by science, or the overwhelming of the brain in catastrophic events.
10.
According to the passage, kindly state that if the statement is true, a myth or undefined (not stated in the passage) : Statement: Most colorblind people see the world in black and white.
Correct Answer
B. Myth
Explanation
The passage does not mention that most colorblind people see the world in black and white. Therefore, the statement is not supported by the passage and can be considered a myth.
11.
According to the passage, kindly state that if the statement is true, a myth or undefined (not stated in the passage):
Statement:
The gene for color blindness is located on the X chromosome.
Correct Answer
A. Truth
Explanation
According to the passage, if the statement is true, it means that the gene for color blindness is indeed located on the X chromosome.
12.
According to the passage, kindly state that if the statement is true, a myth or undefined (not stated in the passage):
Statement:
A baby's cones do not begin to differentiate between many different
colors until he is approximately four months old. This is why many of the
modern toys for very young babies consist of black and white patterns or
primary colors, rather than traditional soft pastels.
Correct Answer
A. Truth
Explanation
The passage states that a baby's cones do not begin to differentiate between many different colors until he is approximately four months old. This implies that the statement is true.
13.
According to the passage, kindly state that if the statement is true, a myth or undefined (not stated in the passage):
Statement:
There are other means of testing for colorblindness, like pointing to an apple and the patient saying what color that apple is.
Correct Answer
C. Undefined
Explanation
The passage does not provide any information about other means of testing for colorblindness, such as pointing to an apple and the patient identifying its color. Therefore, it is undefined whether this statement is true or not based on the passage.
14.
According to the passage, kindly state that if the statement is true, a myth or undefined (not stated in the passage):
Statement:
Colorblindness can aid military soldiers because it gives them the
ability to see through camouflage
Correct Answer
B. Myth
Explanation
The passage does not provide any information about colorblindness aiding military soldiers in seeing through camouflage. Therefore, the statement is not supported by the passage and can be considered a myth.
15.
According to the passage, kindly state that if the statement is true, a myth or undefined (not stated in the passage):
Statement:
Correct Answer
A. Truth