Q. Which of the following is a source of genetic variation in a population? (2000)
A.
Mutation
B.
Natural selection
C.
Gene flow
D.
Both mutation and gene flow
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Solution
Both mutation and gene flow contribute to genetic variation in a population, providing the raw material for evolution.
Correct Answer: D — Both mutation and gene flow
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Q. Which of the following is a source of genetic variation? (1937)
A.
Mutation
B.
Gene Flow
C.
Sexual Reproduction
D.
All of the above
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Solution
All of the options listed (mutation, gene flow, and sexual reproduction) are sources of genetic variation in populations.
Correct Answer: D — All of the above
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Q. Which of the following is an example of a vestigial structure? (2021)
A.
Human appendix
B.
Whale flippers
C.
Bird wings
D.
Insect wings
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Solution
The human appendix is considered a vestigial structure, as it has lost its original function over the course of evolution.
Correct Answer: A — Human appendix
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Q. Which of the following is an example of adaptive radiation? (1970)
A.
The evolution of different species of finches in the Galapagos Islands
B.
The development of antibiotic resistance in bacteria
C.
The color variations in peppered moths
D.
The fossil record of horses
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Solution
Adaptive radiation refers to the rapid evolution of diversely adapted species from a common ancestor, exemplified by the finches in the Galapagos Islands.
Correct Answer: A — The evolution of different species of finches in the Galapagos Islands
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Q. Which of the following is an example of artificial selection? (1995)
A.
Pesticide resistance in insects
B.
Dog breeding
C.
Peppered moth color variation
D.
Antibiotic resistance in bacteria
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Solution
Dog breeding is an example of artificial selection, where humans selectively breed animals for desired traits.
Correct Answer: B — Dog breeding
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Q. Which of the following is an example of convergent evolution? (1980)
A.
Darwin's finches
B.
Whales and fish
C.
Horses and zebras
D.
Dogs and wolves
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Solution
Convergent evolution occurs when unrelated species evolve similar traits, as seen in whales and fish, which both have streamlined bodies for swimming.
Correct Answer: B — Whales and fish
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Q. Which of the following is an example of divergent evolution?
A.
Wings of bats and birds
B.
Body shape of dolphins and sharks
C.
Darwin's finches
D.
Cacti and succulents
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Solution
Darwin's finches are an example of divergent evolution, where different species evolved from a common ancestor and adapted to different environments.
Correct Answer: C — Darwin's finches
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Q. Which of the following is NOT a condition for natural selection to occur?
A.
Variation in traits
B.
Inheritance of traits
C.
Overproduction of offspring
D.
Uniformity of traits
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Solution
Uniformity of traits is not a condition for natural selection; rather, variation in traits is essential for natural selection to act upon.
Correct Answer: D — Uniformity of traits
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Q. Which of the following is NOT a factor that can lead to evolution? (2020)
A.
Natural Selection
B.
Genetic Drift
C.
Environmental Stability
D.
Mutation
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Solution
Environmental Stability does not lead to evolution; rather, it is the changes in the environment that drive evolutionary processes.
Correct Answer: C — Environmental Stability
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Q. Which of the following processes can lead to speciation? (1990)
A.
Geographic isolation
B.
Behavioral isolation
C.
Temporal isolation
D.
All of the above
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Solution
Speciation can occur through various processes, including geographic, behavioral, and temporal isolation, leading to the formation of new species.
Correct Answer: D — All of the above
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Q. Which of the following provides evidence for evolution through common descent? (2010)
A.
Fossil records
B.
Homologous structures
C.
Vestigial organs
D.
All of the above
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Solution
All of the above options provide evidence for evolution through common descent, showing how different species share common ancestors.
Correct Answer: D — All of the above
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Q. Which of the following statements about evolution is true? (2000)
A.
Evolution is a linear process.
B.
Evolution can occur in response to environmental changes.
C.
All traits are adaptive.
D.
Evolution results in perfect organisms.
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Solution
Evolution can occur in response to environmental changes, allowing species to adapt to new conditions over time.
Correct Answer: B — Evolution can occur in response to environmental changes.
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Q. Which scientist is known for the theory of inheritance of acquired characteristics?
A.
Darwin
B.
Mendel
C.
Lamarck
D.
Wallace
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Solution
Jean-Baptiste Lamarck is known for proposing the theory of inheritance of acquired characteristics, which suggests that traits acquired during an organism's lifetime can be passed to offspring.
Correct Answer: C — Lamarck
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Q. Which scientist is known for the theory of punctuated equilibrium? (1972)
A.
Charles Darwin
B.
Stephen Jay Gould
C.
Jean-Baptiste Lamarck
D.
Gregor Mendel
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Solution
Stephen Jay Gould, along with Niles Eldredge, proposed the theory of punctuated equilibrium, which suggests that species remain relatively stable for long periods and then undergo rapid changes.
Correct Answer: B — Stephen Jay Gould
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