Question

1.
Give reasons for the following.
1. Leaves of some plant are modified to spines.
2. A pitcher plant traps and dige
sts insects.
3. Stigmas of wind-pollinated flowers are hairy.​

Answer 1

Answer:

1) for protection from grazing animals

2)These plants usually lack nitrogen , so they obtain nitrogen by trapping the insects

3)Stigmas are hairy to facilitate wind pollination

they can catch the pollen grains pollinated by wind more easily

Answer 2

Answer:

1. Leaves of some plants found in dry areas ( desert) are spiny to prevent the loss of water and to reduce transpiration as water is very precious for survival in dry areas.

2. A pitcher plant ( nepenthes) is an insectivorous plant.

3. Stigmas of wind pollinated flowers are hairy to entrap more and more pollen dispersed by air. This method of pollination is also called as anemophilly