Growth Independent Movements

Q.

Nastic movements differ from tropic movement in being:

A. directional with stimulus

B. non-directional with respect to stimulus

C. controlled by turgor pressure

D. controlled by chemicals

1. A and C

2. B and D

3. Only B

4. None of these

Q. Consider the following phenomena:
1. Closing of leaves by touch-me-not plant on touching its leaves.
2. Growth of plant towards light.
Which of them is a response to a stimulus?

1. Only 1
2. Only 2
3. Both 1 & 2
4. None

Q.

What is tropic movement? Give one example.

Q.

When we touch the leaves of a touch-me-not plant, they begin to fold up and droop. When a seed germinates, the root goes down, the stem comes up into the air. What kind of movement is depicted in the first case and the second case respectively?

1. dependent on growth, independent of growth

2. independent of growth, dependent on growth

3. directional movement, independent of direction

4. independent of touch, dependent on touch