Advertisements
Advertisements
प्रश्न
Differentiate between:
Thigmotropism and geotropism
उत्तर
| Thigmotropism | Geotropism | ||
| 1. | Directional growth movement of a plant part in response to the touch of an object. | 1. | Directional growth movement of a plant part in response to gravity |
| 2. | Stimulus: Touch | 2. | Stimulus: Gravity |
| 3. | The tendrils show positive thigmotropism. | 3. | The roots of the plant show positive geotropism. |
| 4. | The roots of the plant do not show Thigmbtropism. | 4. | The stems show negative Geotropism. |
| 5. | Example: Coiling of tendrils around support. | 5. | Example: Growth of the roots of plants in a downward direction |
APPEARS IN
संबंधित प्रश्न
How do auxins promote the growth of a tendril around a support?
Name the plant part which bends towards light but away from the force of gravity.
Define thigmotropism. Give one example of thigmotropism.
One of the following plant hormones is responsible for the phenomenon of phototropism in plants. This is :
(a) gibberellin
(b) eltroxin
(c) cytokinin
(d) auxin
What is meant by positive and negative tropic movements in plants? Explain them by giving suitable examples.
A growing seedling is kept in the dark room. A burning candle is placed near it for a few days. The tip part of the seedling bends towards the burning candle. This is an example of ______.
Assertion: Plants do have a nervous system for control and coordination.
Reason: Plants use electrochemical means to convey information from cell to cell.
The growth movement of plant parts which occurs due to touch stimulus is called ______.
Name the stimulus which causes the following movement in plant:
Thigmotropism
Name the stimulus which causes the following movement in plant:
Geotropism
