MCQ Collection
MDCAT Biology MCQs
Practice MDCAT Biology questions with answers and explanations.
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Correct Answer: B. Formation of new species
Explanation:
Speciation requires divergence and reproductive isolation.
It may occur with or without geographic separation.
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Correct Answer: C. Formation of new species
Explanation:
Speciation requires divergence and reproductive isolation.
It may occur with or without geographic separation.
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Correct Answer: D. Barriers preventing gene exchange between populations
Explanation:
Isolation may act before or after fertilization.
It allows populations to evolve independently.
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Correct Answer: A. Barriers preventing gene exchange between populations
Explanation:
Isolation may act before or after fertilization.
It allows populations to evolve independently.
Choose an option to check your answer.
Correct Answer: B. Barriers preventing gene exchange between populations
Explanation:
Isolation may act before or after fertilization.
It allows populations to evolve independently.
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Correct Answer: C. Speciation caused by geographic separation
Explanation:
A physical barrier reduces gene flow.
Separated populations may diverge into distinct species.
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Correct Answer: D. Speciation caused by geographic separation
Explanation:
A physical barrier reduces gene flow.
Separated populations may diverge into distinct species.
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Correct Answer: A. Speciation caused by geographic separation
Explanation:
A physical barrier reduces gene flow.
Separated populations may diverge into distinct species.
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Correct Answer: B. Independent evolution of similar traits in unrelated groups
Explanation:
Similar environments can favor similar adaptations.
The resulting structures are often analogous.
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Correct Answer: C. Independent evolution of similar traits in unrelated groups
Explanation:
Similar environments can favor similar adaptations.
The resulting structures are often analogous.
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Correct Answer: D. Independent evolution of similar traits in unrelated groups
Explanation:
Similar environments can favor similar adaptations.
The resulting structures are often analogous.
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Correct Answer: A. Sharp reduction in population size that alters genetic variation
Explanation:
A bottleneck leaves a small surviving gene pool.
Rare alleles may be lost by chance.
