Which of the following statements are concerned with photoperiodism?
(a) Some plants which require the exposure to light for a period exceeding a well defined critical duration before the flowering is initiated in them are called long day plants
(b) Only the duration of light period is important for flowering in plants
(c) The sites of perception of light / dark duration are the leaves
(d) The hormonal substance responsible for flowering migrates from shoot apices to leaves for inducing flowering
(1) (a) & (b) are incorrect
(2) (b) & (c) are incorrect
(3) (b) & (d) are incorrect
(4) (a) & (c) are incorrect
PLZ EXPLAIN.
From the statements given, (b) and (c) are incorrect. Duration of light period along with temperature are the two factors necessary for flowering. Photoperiodic perception occurs at the uppermost maturing leaves. Hence, option (2) is correct.