Photoperiodism

[A] : The increasing daylength increases gonadial development in fishes , birds and mammals . [R] : Photoperiod is an important factor in inducing diapause .

The site of perception of photoperiod is

Photoperiodic stimulus is perceived by

The stimulus for photoperiod is present in

Photoperiods are believed to be perceived by

Photoperiodic stimulus is picked up by

Photoperiodic induction can be produced

Photoperiodic stimules is received by

Photoperiod stimulus is perceived by___pigment.

which of the following plants can flower only if given photoperiod is more than critical day length