2
QuizMultiple Choice

Natural Selection

Question 2 • AISD-Biology B CR (25-26)

If there are only a few remaining members of an insect species living in one area, which would most likely cause this species to become extinct?

Answer
A
the introduction of new predators to the insects’ environment
B
a genetic mutation in an individual that causes it to be very small
C
a disease that causes a mother insect to die shortly after laying eggs
D
the introduction of a new food source to the insects’ environment

Explanation

A small population is especially vulnerable to added threats because losing even a few individuals can greatly reduce its chances of surviving. New predators could kill insects faster than the small population can reproduce, leading to extinction. A mutation affecting one insect or a new food source is less likely to threaten the entire species; the disease in C occurs after the mother has laid eggs, so the eggs may still survive.

AI-written and checked against the verified answer.

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