Question

Which of the following would be a reason for a spcies to undergo cyclic population changes?

a. The keystone species in the ecosystem is removed
b. The vegetation it eats increases and then decreases repeatedly with changing seasons
c. Its predator is preyed upon by a new species introduced to the ecosystem
d. climate change alters the prevalence of parasites that affect the species

Answer 1

B. the vegetation it eats increases and then decreases repeatedly with changing seasons.

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