MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
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Correct Answer: B. Random change in allele frequencies, especially in small populations
Explanation:
Genetic drift can fix or eliminate alleles by chance.
Its effects are strongest in small populations.
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Correct Answer: C. Random change in allele frequencies, especially in small populations
Explanation:
Genetic drift can fix or eliminate alleles by chance.
Its effects are strongest in small populations.
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Correct Answer: D. Reduced genetic variation when a new population begins from few individuals
Explanation:
The founders carry only part of the source population's variation.
Their allele frequencies may differ by chance.
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Correct Answer: A. Reduced genetic variation when a new population begins from few individuals
Explanation:
The founders carry only part of the source population's variation.
Their allele frequencies may differ by chance.
Choose an option to check your answer.
Correct Answer: B. Change in inherited characteristics of populations over generations
Explanation:
Evolution occurs at the population level across generations.
It is driven by mutation, selection, drift, and gene flow.
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Correct Answer: B. Reduced genetic variation when a new population begins from few individuals
Explanation:
The founders carry only part of the source population's variation.
Their allele frequencies may differ by chance.
Choose an option to check your answer.
Correct Answer: C. Change in inherited characteristics of populations over generations
Explanation:
Evolution occurs at the population level across generations.
It is driven by mutation, selection, drift, and gene flow.
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Correct Answer: C. 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.
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Correct Answer: D. would be living
Explanation:
The past decision has an unreal present consequence.
A past perfect condition combines with a present conditional result.
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Correct Answer: A. Although the road was blocked, we arrived on time.
Explanation:
A dependent clause placed before the main clause is normally followed by a comma.
The comma marks the boundary between the two clauses.
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Correct Answer: B. The teacher's desk is near the window.
Explanation:
One teacher owns the desk, so apostrophe-s is added to the singular noun.
The form 'teacher's' correctly shows singular possession.
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Correct Answer: C. The players' uniforms were washed.
Explanation:
The uniforms belong to more than one player.
For a regular plural ending in s, the apostrophe follows the final s.
