Question

8. The diagram shows some movement in plan
(i) Why does the plant move towards the light
(1) What is the aim of the experiment?
source?
(iii) What is geotropism?
(iv) What are tropic movements?
(V) What will happen if the light source is
removed from the experiment?​

Answer 1

Answer:

1. Under normal light conditions auxins are spread out in the plant. But when sunlight varies, auxin is broken down on the sunnier side of the stem. The higher concentration of auxin on the shady side causes the plant cells on that side to grow more so it bends toward the light.
2. the growth of the parts of plants in response to the force of gravity. The upward growth of plant shoots is an instance of negative geotropism ; the downward growth of roots is positive geotropism.
3. Tropic movement is the movement of the plant in response to the stimulus present in the environment, this movement is in response to root and shoot growth. ... Phototropism - It is the movement of a plant in response to light, they will grow towards the direction of the light.
4. But when the light is heavily shaded and comes in from an angle, something interesting happens. Auxin starts to concentrate on the shaded side of the plant instead, and as a result, the cells on the sunny side stay the same size but the cells on the shaded side grow longer. This causes the plant to tip and grow towards the light.
6. phototropism - auxin