In which animal would you expect circannual rhythms to be most pronounced?
A) Humans
B) Hummingbirds that live in relatively constant environments
C) Bears that hibernate in the winter
D) Fruit flies,whose life span is usually shorter than a month
E) None of the above

Question

Quizplus · Accepted Answer

Circannual rhythms refer to biological rhythms that occur on an annual basis. Animals that exhibit hibernation behavior, such as bears, have a very distinct annual cycle, with a period of activity followed by a period of hibernation. This makes circannual rhythms most pronounced in bears.

In Which Animal Would You Expect Circannual Rhythms to Be