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Natural selection can act only on traits that are:

APractised
BHeritable
CAcquired
DLearned
Answer & Solution
Correct answer: B. Heritable
1. Alleles pass from parent to offspring. 2. Only heritable traits are selected. 3. Gym muscle is not passed on. _Source: OpenStax Biology 2e, Chapter 19, The Evolution of Populations (CC BY 4.0)._
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