Refer to the Figure

question 8

Multiple Choice

Refer to the figure.
The bottom figure's findings best support the proximate-level hypothesis that

• A) crickets use the light and dark as environmental cues to entrain their circadian rhythm.
• B) crickets have an internal clock that maintains a regular cycle of calling in the absence of environmental cues.
• C) it is adaptive for male crickets to have a circadian rhythm in order to match female activity and increase chances of reproduction.
• D) the molecule juvenile hormone (J
• H) is responsible for regulating the cricket's circadian rhythm.

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