The cylinders in this experiment represent a 24-hour period. The light area represents light periods during a 24-hr. period and the dark area represents dark periods during a 24-hr. period. The critical length of dark vs. light periods for flowering is depicted by the dotted line. Note that some plants are flowering and some are not flowering. Study the results of this experiment on photoperiodism and flowering to determine whether the following statements are true or false.
-Long-day plants flower when the day length is longer than the critical period.

Question

Quizplus · Accepted Answer

Long-day plants require a longer duration of daylight to initiate flowering, which means the day length must exceed a specific critical period for them to flower.

The Cylinders in This Experiment Represent a 24-Hour Period