Give reasons for the following.
- Insect pollinated flowers are brightly coloured and sweet smelling.
- Spores are covered by a hard covering.
- Wind pollinated flowers produce large number of pollen grains.
- Hooks and spines are present in seeds or fruits dispersed by animals.
- Seed dispersal helps the plant.
- Insect pollinated flowers are brightly coloured and sweet smelling to attract insects to itself.
- Spores are covered by a hard covering to provide protection from harsh conditions.
- During wind pollination many pollen grains are lost. So to ensure that at least
some pollens reach the stigma, a large number of pollen grains are produced.
- Hooks and spines help seeds and fruits to stick to the bodies of animals and be safely dispersed or transported to far off places.
- To avoid growing of the plants at one place leading to scarcity of nutrients and ensure survival of the plants, seeds are dispersed.