Question

Explain the two examples, movements in plants that are growth independent.

Answer 1

Growth-independent movement in plants:

1. The movement of plants that do not result in their growth is known as the growing independent movement of plants.
2. There are many plants that show the growth of independent movements.
3. E.g. In the case of Mimosa, movement is in response to the stimulus of touch.
4. This information of touch is transferred by means of electrical and chemical signals from one cell to another.
5. Then the movement is brought about as the plant cells change their shapes by altering the amount of water in them.
6. The cells either swell or shrink and thus, change their shapes.
7. Some other movements seen in plants that are growth-independent are - lotus flowers open in the morning and the tuberose, at night; the tentacles on the leaves of the insectivorous plants like drosera curl inwards at the touch of an insect, etc.