Scientists hypothesize that a certain fungus is killing the frogs in Pond X.
Which one of the following, if true, most strengthens the hypothesis?
Answer and explanation
Correct answer: C. Frogs in ponds treated with a fungicide survived at higher rates than those in untreated ponds
- Step 1: Removing the fungus improved survival. Step 2. This supports the fungus as the cause. Answer: the treated ponds. Why not the others: these are irrelevant to the fungus.
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