14
QuizMultiple Choice

Population Size and Structure — Unit test

Question 14 • CA-Life Science B (High School)

Barnacles and whales have a commensalistic relationship in which barnacles benefit. What would most likely happen to the whale population if the barnacle population decreased?

Answer
A
become extinct
B
decrease
C
increase
D
stay the same

Explanation

In a commensalistic relationship, barnacles benefit by attaching to whales, while the whales are neither helped nor harmed. If the barnacle population decreased, the whale population would most likely stay the same because the barnacles’ presence does not significantly affect the whales.

AI-written and checked against the verified answer.

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