The site of perception of light for photoperiodism is:

The term "photoperiodism" was proposed by, or the phenomenon of photoperiodism in plants was discovered by:

There are many plants that do not show any correlation between exposure to light duration and the induction of flowering. Such plants are called $..........$.

What is the function of light in plants?

Phytochrome is associated with which of the following processes?

Which of the following is a day-neutral plant?