Which of the following mechanisms is most directly responsible for controlling circadian rhythms in plants?
A) periodic oscillations of light and dark
B) periodic oscillations of gene transcription
C) a free-running period of 24-hours
D) changes in temperature that correlate with light and dark

Question

Quizplus · Accepted Answer

Circadian rhythms in plants are most directly controlled by periodic oscillations of gene transcription. This involves the cyclical activation and repression of specific genes that regulate various physiological processes in accordance with a roughly 24-hour cycle, independent of external cues like light and temperature.

Which of the Following Mechanisms Is Most Directly Responsible for Controlling