Bio 1 - Unit 7: Evolution
Questions and Answers
- 1.
The difference in the physical traits of an individual from those of other individuals in a group is called a(n)
- A.
Variation.
- B.
Change.
- C.
Adaptation.
- D.
Species.
Correct Answer
A. Variation.Explanation
The term "variation" refers to the differences in physical traits between individuals within a group. It implies that individuals within a population can have different characteristics, such as height, hair color, or eye color. "Change" refers to a general alteration or modification, which does not specifically address physical traits. "Adaptation" refers to the process by which individuals become better suited to their environment, rather than the physical traits themselves. "Species" refers to a group of organisms that can interbreed and produce fertile offspring, which is not directly related to physical traits. Therefore, the correct answer is variation.Rate this question:
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- 2.
Which of the following is a term for a group of similar organisms that can reproduce and produce fertile offspring?
- A.
Individual
- B.
Population
- C.
Species
- D.
Fossil
Correct Answer
C. SpeciesExplanation
A species is a term for a group of similar organisms that can reproduce and produce fertile offspring. This means that members of the same species are able to mate and have offspring that are also capable of reproducing. The concept of a species is important in understanding the classification and diversity of living organisms. It helps scientists categorize and study different groups of organisms based on their shared characteristics and reproductive abilities.Rate this question:
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- 3.
If an organism has a vestigial structure, that structure likely once had a function in a(n)
- A.
Earlier ancestor.
- B.
Close relative.
- C.
Unrelated organism.
- D.
Embryological stage.
Correct Answer
A. Earlier ancestor.Explanation
If an organism has a vestigial structure, it means that the structure is present in the organism but no longer serves a purpose. This suggests that the structure had a function in an earlier ancestor, but has become unnecessary or non-functional over time. The presence of vestigial structures is often used as evidence for evolution, as it implies that organisms have evolved from ancestors that had a use for these structures.Rate this question:
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- 4.
What is the term for a feature that allows an organism to survive better in its environment?
- A.
Variation
- B.
Adaptation
- C.
Homologous structure
- D.
Vestigial structure
Correct Answer
B. AdaptationExplanation
Adaptation is the term used to describe a feature that allows an organism to survive better in its environment. This feature could be a physical characteristic, a behavior, or even a physiological process that helps the organism to better cope with the challenges and demands of its surroundings. Through adaptation, organisms are able to increase their chances of survival and reproduction, ultimately leading to the continuation of their species.Rate this question:
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- 5.
Which theory states that floods and earthquakes have occurred often in Earth's history?
- A.
Catastrophism
- B.
Uniformitarianism
- C.
Gradualism
- D.
Natural selection
Correct Answer
A. CatastrophismExplanation
Catastrophism is the theory that states that floods and earthquakes have occurred often in Earth's history. This theory suggests that these natural disasters are caused by sudden and catastrophic events, rather than gradual processes. It proposes that the Earth has experienced multiple catastrophic events throughout its history, leading to major changes in the landscape. This theory contrasts with uniformitarianism, which suggests that geological processes occur slowly and gradually over long periods of time. Gradualism and natural selection are unrelated to the occurrence of floods and earthquakes in Earth's history.Rate this question:
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- 6.
Charles Darwin found fossils that looked like ancient versions of living species. From this evidence Darwin suggested that Earth was
- A.
Only 6000 years old.
- B.
Only 2000 years old.
- C.
Less than 6000 years old.
- D.
Much more than 6000 years old.
Correct Answer
D. Much more than 6000 years old.Explanation
Based on the fossils that Charles Darwin found, which resembled ancient versions of living species, he suggested that Earth was much more than 6000 years old. This implies that he rejected the idea that Earth was only 6000 or 2000 years old, and also that it was less than 6000 years old. The discovery of these fossils provided evidence for the concept of evolution and challenged the prevailing belief in a young Earth.Rate this question:
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- 7.
The process of biological change over time by which descendants come to differ from their ancestors is called ___.
- A.
Evolution
- B.
Artificial selection
- C.
Uniformitarianism
- D.
Mutation
Correct Answer
A. EvolutionExplanation
Evolution is the correct answer because it refers to the process of biological change over time, where descendants gradually differ from their ancestors. This process involves genetic variations and natural selection, leading to the development of new species and the adaptation of organisms to their environments. Artificial selection involves human intervention in breeding to select desired traits, while uniformitarianism is a geological principle. Mutation refers to a change in the DNA sequence, which can contribute to evolution but is not the overarching process itself.Rate this question:
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- 8.
Some organisms that share a common ancestor have features that have different functions, but similar structures. These are known as
- A.
Homologous structures
- B.
Analogous structures
- C.
Vestigial structures
- D.
Fossil structures
Correct Answer
A. Homologous structuresExplanation
Homologous structures are features in organisms that have different functions but similar structures, indicating a common ancestry. These structures may have evolved to perform different tasks in different species but share a similar underlying structure. This similarity suggests that these organisms share a common ancestor and have diverged over time. Analogous structures, on the other hand, have similar functions but different structures and do not indicate a common ancestry. Vestigial structures are remnants of once-functional features that no longer serve a purpose. Fossil structures refer to the preserved remains or traces of ancient organisms.Rate this question:
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- 9.
The wing of an ostrich would be classified as a(n) ___.
- A.
Homologous structure
- B.
Analogous structure
- C.
Vestigial structure
- D.
Fossil structure
Correct Answer
C. Vestigial structureExplanation
The wing of an ostrich would be classified as a vestigial structure. This is because ostriches are flightless birds and their wings have evolved to become small and non-functional over time. These vestigial wings serve no purpose in terms of flight but are remnants of their flying ancestors.Rate this question:
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- 10.
Modern whales have vestigieal pelvic bones and lungs instead of gills. What does this evidence suggest about whale ancestors?
- A.
Whale ancestors lived on land.
- B.
Whale ancestors did not evolve.
- C.
Whale ancestors lived 850 million years ago.
- D.
Whale ancestors ate opossums.
Correct Answer
A. Whale ancestors lived on land.Explanation
The presence of vestigial pelvic bones and lungs in modern whales suggests that their ancestors lived on land. These structures were likely used by their terrestrial ancestors for locomotion and respiration. Over time, as whales evolved and adapted to an aquatic lifestyle, these structures became reduced and no longer served their original purpose. The presence of these vestigial structures provides evidence of the evolutionary history of whales and their transition from land-dwelling mammals to the marine creatures we see today.Rate this question:
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- 11.
Which of the following facts supporting evolution would be found in the study of embryology?
- A.
Embryos of very different organisms have very similar developmental stages.
- B.
A bats wing and a whales flipper have very similar bone structure.
- C.
Large, flightless birds are found on different continents: Australia (Emu), Africa (Ostrich), and Rhea (South America).
- D.
More primative fossils are found below more complex fossils in the rock layers.
Correct Answer
A. Embryos of very different organisms have very similar developmental stages.Explanation
Embryos of very different organisms having similar developmental stages supports the idea of evolution. This similarity suggests that these organisms share a common ancestry and have undergone similar developmental processes throughout evolution. The study of embryology provides evidence for the relatedness of different species and their evolutionary history. It demonstrates that organisms with different adult forms can share similar developmental patterns, indicating a common origin and evolutionary relationship.Rate this question:
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- 12.
Which of the following facts supporting evolution would be found in the study of comparative anatomy?
- A.
Embryos of very different organisms have very similar developmental stages.
- B.
A bats wing and a whales flipper have very similar bone structure.
- C.
Large, flightless birds are found on different continents: Australia (Emu), Africa (Ostrich), and Rhea (South America).
- D.
More primative fossils are found below more complex fossils in the rock layers.
Correct Answer
B. A bats wing and a whales flipper have very similar bone structure.Explanation
Comparative anatomy is the study of the similarities and differences in the structure of different organisms. The fact that a bat's wing and a whale's flipper have very similar bone structure supports the concept of evolution. This similarity suggests that these two organisms share a common ancestor and have undergone modifications over time to adapt to their respective environments. The presence of homologous structures, such as these similar bones, provides evidence for the evolutionary relationship between different species.Rate this question:
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- 13.
When a few individuals start a new colony, it most likely results in ...
- A.
Genetic drift through the founder effect.
- B.
More variety in the new population.
- C.
Extinction due to the bottleneck effect.
- D.
Mutation due to disruptive selection.
Correct Answer
A. Genetic drift through the founder effect.Explanation
When a few individuals start a new colony, it most likely results in genetic drift through the founder effect. This is because when a small group of individuals establishes a new population, the genetic makeup of the founders becomes the basis for the entire population. Due to the limited genetic diversity of the founders, there is a higher chance of genetic drift occurring, where certain traits become more or less common in the population simply by chance. This can lead to changes in the gene pool over time and the establishment of unique genetic characteristics in the new population.Rate this question:
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- 14.
The movement of alleles from one population to another is called ___.
- A.
The founder effect
- B.
Microevolution
- C.
Genetic drift
- D.
Gene flow
Correct Answer
D. Gene flowExplanation
Gene flow refers to the movement of alleles or genes from one population to another. It occurs when individuals migrate and reproduce with individuals from another population, resulting in the transfer of genetic material. This process can introduce new genetic variations into a population and can also help to maintain genetic diversity within and between populations. Therefore, gene flow is the correct term to describe the movement of alleles from one population to another.Rate this question:
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- 15.
Which of the following is not a mechanism for evolution?
- A.
Natural selection
- B.
Sexual selection
- C.
Genetic drift
- D.
Random mating
Correct Answer
D. Random matingExplanation
Random mating is not a mechanism for evolution because it does not lead to any changes in the genetic composition of a population. In random mating, individuals mate with each other without any preference or selection based on certain traits. This means that there is no differential reproductive success or selection pressure acting on specific traits, which is necessary for evolution to occur. In contrast, natural selection, sexual selection, and genetic drift all involve mechanisms that can lead to changes in the genetic makeup of a population over time.Rate this question:
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- 16.
Which of the five mechanisms of evolution is illustrated in the following scenario: A change in body color enabled animals to better hide from predators.
- A.
Natural selection
- B.
Gene flow
- C.
Genetic drift
- D.
Mutation
Correct Answer
A. Natural selectionExplanation
The change in body color enabling animals to better hide from predators is an example of natural selection. Natural selection is the process by which certain traits become more or less common in a population over time due to their impact on survival and reproduction. In this scenario, the animals with the advantageous trait of better body color for hiding have a higher chance of surviving and passing on this trait to their offspring, while those without this trait are more likely to be preyed upon. This leads to an increase in the frequency of the trait in the population over generations.Rate this question:
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- 17.
When bull elephants charge each other and but heads, they are exhibiting ____ behavior.
- A.
Intrasexual selection
- B.
Intersexual selection
- C.
Isolation
- D.
Natural selection
Correct Answer
A. Intrasexual selectionExplanation
When bull elephants charge each other and butt heads, they are exhibiting intrasexual selection behavior. Intrasexual selection refers to competition between individuals of the same sex for access to mates. In this case, the bull elephants are engaging in aggressive behavior to establish dominance and secure reproductive opportunities with females. This behavior is not related to intersexual selection, isolation, or natural selection.Rate this question:
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- 18.
When a male bird of paradise displays its tail feathers, it is exhibiting ____ behavior.
- A.
Intrasexual selection
- B.
Intersexual selection
- C.
Isolation
- D.
Natural selection
Correct Answer
B. Intersexual selectionExplanation
Intersexual selection refers to the process where individuals of one sex choose mates based on certain desirable traits or behaviors displayed by individuals of the opposite sex. In the case of male birds of paradise, they exhibit elaborate and colorful tail feathers during courtship displays to attract females. This behavior is a clear example of intersexual selection, as the males are trying to impress and attract females for mating purposes.Rate this question:
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- 19.
The differences between members of the same species are known as ___.
- A.
Variations
- B.
Adaptations
- C.
Mutations
- D.
Genetic isolation
Correct Answer
A. VariationsExplanation
The differences between members of the same species are known as variations. Variations can be caused by genetic factors or environmental factors and can result in differences in physical characteristics, behavior, or other traits within a species. These variations are important for the process of natural selection, as they provide the raw material for evolution to occur. Adaptations, mutations, and genetic isolation are all related concepts but refer to specific types of variations within a population.Rate this question:
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- 20.
A ___ is a group of individuals of the same species in the same geographic area.
- A.
Population
- B.
Species
- C.
Breeding family
- D.
Community
Correct Answer
A. PopulationExplanation
A population is a group of individuals of the same species in the same geographic area. This term is used to describe the total number of individuals of a particular species that can be found in a specific area. It refers to a group of organisms that are capable of interbreeding and sharing a common gene pool. The concept of population is important in ecology and evolutionary biology as it helps in studying the dynamics and interactions of species within a given area.Rate this question:
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- 21.
The process by which individuals that are better suited to their environment survive and reproduce more successfully than others is known as ___.
- A.
Natural selection
- B.
Sexual selection
- C.
Genetic drift
- D.
Gene flow
Correct Answer
A. Natural selectionExplanation
Natural selection is the process by which individuals that are better suited to their environment survive and reproduce more successfully than others. This means that individuals with advantageous traits are more likely to pass on their genes to the next generation, while those with less advantageous traits are less likely to survive and reproduce. Over time, this leads to the accumulation of beneficial traits in a population, increasing its overall fitness and adaptation to the environment. Sexual selection, genetic drift, and gene flow are also important evolutionary processes, but they do not specifically refer to the survival and reproduction of individuals that are better suited to their environment.Rate this question:
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- 22.
The development by scientists of a new color in a rose is the result of ___.
- A.
Artificial selection
- B.
Natural selection
- C.
Overproduction
- D.
Decent with modification
Correct Answer
A. Artificial selectionExplanation
The development of a new color in a rose by scientists is the result of artificial selection. This process involves deliberately choosing and breeding plants with desirable traits, such as color, in order to create new varieties. In this case, scientists likely selected roses with certain color traits and bred them together to create a new rose color that did not exist naturally. This is different from natural selection, which is the process by which organisms with advantageous traits are more likely to survive and reproduce in their natural environment.Rate this question:
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- 23.
In natural selection, the selective agent is the ___.
- A.
Environment
- B.
Humans
- C.
Mutations
- D.
Breeders
Correct Answer
A. EnvironmentExplanation
In natural selection, the selective agent refers to the factor in the environment that determines which individuals are more likely to survive and reproduce. The environment plays a crucial role in selecting individuals with advantageous traits, allowing them to pass on their genes to the next generation. This process leads to the adaptation and evolution of species over time.Rate this question:
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- 24.
Genetic variation can arise from a random change in the DNA of a gene. This change is called a(n) ___.
- A.
Mutation
- B.
Hybridization
- C.
Population
- D.
Recombination
Correct Answer
A. MutationExplanation
Genetic variation can occur due to a random change in the DNA of a gene, which is known as a mutation. Mutations can result in different versions of a gene, leading to variations in traits within a population. Hybridization refers to the breeding of individuals from different species or genetically distinct populations. Population refers to a group of organisms of the same species living in the same area. Recombination is the process by which genetic material is rearranged during sexual reproduction.Rate this question:
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- 25.
A problem in all populations influenced by the bottleneck effect is that ___.
- A.
Genetic variation is lost
- B.
Alleles can't become fixed
- C.
Offspring inherit harmful alleles
- D.
Chance no longer affects them
Correct Answer
A. Genetic variation is lostExplanation
The bottleneck effect refers to a drastic reduction in population size, leading to a loss of genetic variation. This occurs because only a small subset of individuals survive the bottleneck event, resulting in a limited gene pool. With reduced genetic variation, populations become more susceptible to genetic disorders and diseases, as harmful alleles may become more prevalent. Therefore, the correct answer is that genetic variation is lost in populations influenced by the bottleneck effect.Rate this question:
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- 26.
Over time , adaptations can lead populations to experience ___.
- A.
Genetic changes
- B.
Environmental changes
- C.
Geologic changes
- D.
Extinctions
Correct Answer
A. Genetic changesExplanation
Adaptations refer to the changes in an organism's traits over time in response to its environment. These changes are often driven by genetic variations that allow individuals with advantageous traits to survive and reproduce, passing on these traits to future generations. Therefore, it is logical to conclude that over time, adaptations can lead populations to experience genetic changes.Rate this question:
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- 27.
All the rabbits living in a particular area would be and example of a(n) ___.
- A.
Population
- B.
Species
- C.
Fossil
- D.
Individual organism
Correct Answer
A. PopulationExplanation
A population refers to a group of individuals of the same species living in the same area. In this case, all the rabbits living in a particular area would be considered a population because they are all of the same species (rabbits) and are living together in the same area.Rate this question:
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- 28.
Which of the following is a fossil?
- A.
A plant that has recently died
- B.
A group of similar organisms that can reproduce
- C.
The structure or organ that no longer functions
- D.
A trace of an organism that existed in the past
Correct Answer
D. A trace of an organism that existed in the pastExplanation
A fossil is a trace of an organism that existed in the past. Fossils can be the remains of plants, animals, or other organisms that have been preserved in rocks or other materials. They provide valuable evidence of past life on Earth and can help scientists understand the history of life and how organisms have evolved over time. Fossils can include bones, shells, footprints, and other impressions left behind by ancient organisms.Rate this question:
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- 29.
What did Charles Darwin observe in finch populations on the Galpagos Islands off the coast of South America?
- A.
Different species on different islands
- B.
All species on one of the islands
- C.
Identical species on all the islands
- D.
The same species as in North America
Correct Answer
A. Different species on different islandsExplanation
Charles Darwin observed different species of finches on different islands of the Galapagos Islands. This observation is known as adaptive radiation, where a single species can evolve into multiple species with different characteristics to adapt to different environments. This observation was crucial in developing Darwin's theory of evolution by natural selection.Rate this question:
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- 30.
Fossils of marine organisms high in the Andes Mountains led Darwin to conclude that ___.
- A.
Earth is 6000 years old
- B.
Interspecific variation had taken place
- C.
Great change can happen over time
- D.
An earthquake had taken place
Correct Answer
C. Great change can happen over timeExplanation
The presence of marine fossils high in the Andes Mountains suggests that the area was once underwater. This led Darwin to conclude that great change can happen over time, as the mountains must have been uplifted over millions of years to their current height. This supports the idea of gradual geological processes and the concept of long-term evolution, rather than sudden and catastrophic events like earthquakes.Rate this question:
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- 31.
Two organisms that are closely related would have ___.
- A.
Very similar DNA sequences
- B.
Exactly the same DNA sequences
- C.
No proteins in common
- D.
Completely different DNA sequences
Correct Answer
A. Very similar DNA sequencesExplanation
Two organisms that are closely related would have very similar DNA sequences because DNA is the genetic material that carries the instructions for the development and functioning of an organism. Organisms that share a recent common ancestor would have inherited most of their DNA sequences from that ancestor, resulting in a high degree of similarity between their DNA sequences. This similarity in DNA sequences reflects the genetic relatedness between the organisms.Rate this question:
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- 32.
Evolution is considered to be one of the most important theories in science, because it ___.
- A.
Unites the fields of biology, geology, chemistry, and ecology
- B.
Was developed more than 100 years ago
- C.
Is not supported by the fossil record
- D.
Was discovered by Charles Darwin, a famous scientist
Correct Answer
A. Unites the fields of biology, geology, chemistry, and ecologyExplanation
Evolution is considered to be one of the most important theories in science because it unites the fields of biology, geology, chemistry, and ecology. This means that it provides a framework that connects these different scientific disciplines, allowing for a more comprehensive understanding of how life on Earth has changed over time. By integrating evidence from these various fields, scientists can develop a more complete picture of the mechanisms and patterns of evolution, leading to advancements in our knowledge and understanding of the natural world.Rate this question:
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- 33.
The more genetic variation a population has, the more likely it is that some individuals will ___.
- A.
Evolve
- B.
Migrate
- C.
Survive
- D.
Mutate
Correct Answer
C. SurviveExplanation
Genetic variation refers to the diversity of genes within a population. When a population has more genetic variation, it means that there is a wider range of genetic traits present. This increased diversity provides a greater chance that some individuals will possess advantageous traits that allow them to adapt and survive in changing environments. These individuals are more likely to pass on their beneficial traits to future generations, increasing the overall survival and success of the population. Therefore, the more genetic variation a population has, the more likely it is that some individuals will survive.Rate this question:
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- 34.
Which of the following is not a mechanism of evolution?
- A.
Mutation
- B.
Natural selection
- C.
Sexual selection
- D.
Overproduction
Correct Answer
D. OverproductionExplanation
Overproduction is not a mechanism of evolution because it refers to the production of more offspring than can survive in a given environment, and it does not directly contribute to the genetic changes in a population over time. In contrast, mutation is a mechanism of evolution as it introduces new genetic variations, natural selection acts on these variations to favor individuals with advantageous traits, and sexual selection influences the reproductive success of individuals based on their traits.Rate this question:
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- 35.
The two processes of sexual selection are ___ and ___.
- A.
Gene flow and sexual selection
- B.
Intersexual and intrasexual
- C.
Founder effect and bottleneck effect
- D.
Mutation and variation
Correct Answer
B. Intersexual and intrasexualExplanation
Intersexual and intrasexual are the two processes of sexual selection. Intersexual selection occurs when individuals of one sex choose mates based on specific traits or behaviors, such as elaborate plumage or impressive displays. Intrasexual selection, on the other hand, involves competition between members of the same sex for access to mates, often through aggressive behaviors or displays. These two processes play a crucial role in shaping the evolution of certain traits and behaviors in species.Rate this question:
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- 36.
The two processes of genetic drift are ___ and ___.
- A.
Gene flow and sexual selection
- B.
Intersexual and intrasexual
- C.
Founder effect and bottleneck effect
- D.
Mutation and variation
Correct Answer
C. Founder effect and bottleneck effectExplanation
The correct answer is founder effect and bottleneck effect. The founder effect occurs when a small group of individuals migrates and establishes a new population, resulting in a loss of genetic variation. The bottleneck effect occurs when a population undergoes a drastic reduction in size, leading to a random loss of genetic diversity. Both processes can lead to changes in allele frequencies and the genetic composition of a population over time.Rate this question:
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- 37.
Which hominid was the first to tame fire?
- A.
Homo erectus
- B.
Homo habilis
- C.
Homo sapiens
- D.
Homo neanderthalensis
Correct Answer
A. Homo erectusExplanation
Homo erectus is believed to be the first hominid to tame fire. This species lived between 1.9 million and 70,000 years ago and evidence suggests that they were able to control and use fire for various purposes, such as cooking food, providing warmth, and protection. The controlled use of fire by Homo erectus was a significant milestone in human evolution as it allowed for improved survival and adaptation to different environments.Rate this question:
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- 38.
Which hominid was the last to compete with Homo sapiens?
- A.
Homo erectus
- B.
Homo habilis
- C.
Homo erigaster
- D.
Homo neanderthalensis
Correct Answer
D. Homo neanderthalensisExplanation
Homo neanderthalensis was the last hominid to compete with Homo sapiens. Neanderthals lived alongside early humans in Europe and parts of Asia for thousands of years. They were well-adapted to their environment and had similar cognitive abilities to Homo sapiens. However, Homo sapiens eventually outcompeted Neanderthals, possibly due to factors such as technological advancements, better social organization, or greater adaptability to different environments. The exact reasons for their extinction and the nature of the competition between the two species are still debated among scientists.Rate this question:
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- 39.
Which hominid was the first to walk upright?
- A.
Homo erectus
- B.
Australopithecus africanus
- C.
Australopithecus aferensis
- D.
Homo neanderthalensis
Correct Answer
C. Australopithecus aferensisExplanation
Australopithecus aferensis is believed to be the first hominid to walk upright based on fossil evidence. This species, which lived between 3.9 and 2.9 million years ago, had a combination of ape-like and human-like features, including a more upright posture and the ability to walk on two legs. This adaptation was likely an important step in the evolution of humans, as it freed up the hands for other tasks and allowed for more efficient movement.Rate this question:
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- 40.
Which hominid is considered to be our direct ancestor?
- A.
Homo erectus
- B.
Australopithecus africanus
- C.
Australopithecus aferensis
- D.
Homo neanderthalensis
Correct Answer
A. Homo erectusExplanation
Homo erectus is considered to be our direct ancestor because it is believed to have been the first hominid species to have characteristics more similar to modern humans. Homo erectus had a larger brain size, walked upright, and used tools, indicating a higher level of intelligence and adaptability. This species is believed to have lived around 1.9 million to 143,000 years ago, overlapping with the emergence of Homo sapiens. Fossil evidence suggests that Homo erectus gradually evolved into Homo sapiens, making it a likely direct ancestor of modern humans.Rate this question:
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Test Your knowledge about Vestigial Structures Quiz
Test Your knowledge about Vestigial Structures Quiz
Take The Quiz To Learn About Analogous & Homologous Characters
Take The Quiz To Learn About Analogous & Homologous Characters
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