Question

which of the following is true of extinctions? choose 1 answer: a an extinction can be overcome if some individuals have adaptations allowing them to survive changes in the environment. b if a population goes extinct, its collection of genes are lost and cannot continue to play a role in its species’ evolution. c an extinction involves a temporary and reversible loss of a group of organisms.

Explanation:

• Option A: Extinction means the complete loss of a species or population. If some individuals survive, it's not extinction, so A is wrong.
• Option B: When a population goes extinct, all its members (and their genes) are lost. These genes can no longer contribute to the species' evolution, which is correct.
• Option C: Extinction is permanent, not temporary or reversible for the lost group, so C is wrong.

Answer:

B. If a population goes extinct, its collection of genes are lost and cannot continue to play a role in its species’ evolution.