Set 2: Command of Evidence (Intermediate)

Explanation

Answer: A

PASSAGE

CRISPR-Cas9 is a gene-editing technology that allows scientists to modify DNA sequences with unprecedented precision. While promising for treating genetic diseases, it raises ethical concerns: changes made to 'germline' cells can be inherited by future generations, permanently altering the human gene pool.

Why are germline edits particularly concerning?

A. They are more expensive than other methods.✓ Correct

B. They only affect the individual being treated.

C. They can pass to offspring, affecting future generations.

D. They are completely reversible.

Detailed Explanation

This question requires you to identify evidence that supports a claim. The text states germline changes 'can be inherited by future generations, permanently altering the human gene pool.' 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:

• "inherited by future generations"

• "permanently altering"

Why others are wrong: B (The opposite; they affect FUTURE generations.), C (This option is incorrect.), D (The text says 'permanently,' implying irreversibility.).

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