5

Set 5: Command of Evidence (Intermediate)

Explanation

Answer: D

PASSAGE

Mitochondria have their own DNA, separate from nuclear DNA. They are inherited exclusively from the mother. Scientists use mitochondrial DNA to trace maternal lineages.

Why is mitochondrial DNA useful for ancestry?

A. It mutates rapidly.
B. It traces a clear maternal line without paternal mixing.
C. It's identical in all humans.
D. It shows paternal heritage.✓ Correct

Detailed Explanation

This question requires you to identify evidence that supports a claim. 'Inherited exclusively from the mother' = clear maternal line. The best evidence directly and explicitly supports the stated claim without requiring assumptions. Match specific textual details or data points to the claim being made. The correct answer provides clear, direct support. Strong evidence directly addresses the claim without requiring additional interpretation. When evaluating options, look for quotes or data that explicitly support the statement. Weak evidence may be tangentially related but doesn't provide direct proof.

Key Evidence:

• "Mitochondria have their own DNA, separate from nuclear DNA"

• "They are inherited exclusively from the mother"

Why others are wrong: A (This option is incorrect.), B (This option is incorrect.), C (This option is incorrect.).