Give reasons for the following. Insect pollinated flowers are brightly coloured and sweet smelling

cbse
cbse-class-7-science
reproduction-plants

#1

Give reasons for the following.

  1. Insect pollinated flowers are brightly coloured and sweet smelling.
  2. Spores are covered by a hard covering.
  3. Wind pollinated flowers produce large number of pollen grains.
  4. Hooks and spines are present in seeds or fruits dispersed by animals.
  5. Seed dispersal helps the plant.

Answer:

  1. Insect pollinated flowers are brightly coloured and sweet smelling to attract insects to itself.
  2. Spores are covered by a hard covering to provide protection from harsh conditions.
  3. 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.
  4. Hooks and spines help seeds and fruits to stick to the bodies of animals and be safely dispersed or transported to far off places.
  5. To avoid growing of the plants at one place leading to scarcity of nutrients and ensure survival of the plants, seeds are dispersed.