Give reason for the following
Despite availability of plenty of water, leaves of certain plants wilt during the day and recover in the evening.
Give reason for the following
The wing of a bat is said to be homologous to the wing of a bird and analogous to the wing of an insect.
Give reason for the following
Symptoms of deficiency of certain nutrients appear in the old leaves first.
Mention the most significant role of each of the following :
Fovea centralis
Fovea centralis is the point of sharpest and clearest as it has the highest density of cones.