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प्रश्न
Differentiate between:
Phototropism and chemotropism
उत्तर
| Phototropism | Chemotropism | ||
| 1. | Directional growth movement of a plant part in response to light. | 1. | Directional growth movement of a plant part in response to chemicals. |
| 2. | Example: Growth of plant shoots in an upward direction. | 2. | Example: Growth of pollen tube towards female gametophyte |
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संबंधित प्रश्न
Fill in the following blank :
...... is the hormone that causes phototropism in plants
Name the plant organ which is negatively geotropic.
Define hydrotropism. Give one example of hydrotropism. State whether this example is of positive hydrotropism or negative hydrotropism. Illustrate your answer with the help of labelled diagram.
The stimulus in the process of thigmotropism is ______.
How is movement in plants different from that in animals?
The bending of root of a plant in response to water is called ______.
Plants take in carbondioxide for photosynthesis but need ______ for their living.
The leaves of Mimosa are sensitive to ____________.
In the given figure (a), (b) and (c), which appears more accurate and why?
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| (a) | (b) | (c) |
The figure given below depicts a kind of tropic movement in plants. Study the same and answer the following questions:
- What kind of a movement is shown in the figure? Define it.
- How does this movement differ from geotropism?
- Name the stimulus responsible for thigmotropism. Give one example of a plant showing thigmotropism.
- Name one stimulus which gives a positive response for the roots but a negative response for the shoot.
- Draw a neat and labelled diagram of the part of a plant showing leaf tendril. Name the plant.
