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प्रश्न
The movement of shoot towards light is
पर्याय
geotropism
hydrotropism
chemotropism
phototropism
उत्तर
phototropism
Explanation -
The term "Photo" means light and "tropism" means directional movement. Shoot responds to light by growing towards the direction of the source of light. This is termed phototropism.
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संबंधित प्रश्न
What is meant by nastic movements in plants? Give one example of nastic movements in plants.
Name the plant organ which is positively hydrotropic.
What is meant by 'tropisms' (or tropic movements)? Explain with an example.
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
Name the stimulus which causes the following movements in plants.
phototropism, thigmotropism, hydrotropism and geotropism
Match column A with column B.
| Column A | Column B |
| Roots growing downwards into soil. | Positive phototropism |
| Shoots growing towards the light. | Negative geotropism |
| Shoots growing upward. | Negative phototropism |
| Roots growing downwards away from light. | Positive geotropism |
Name the part of plant which shows positive geotropism. Why?
The leaves of Mimosa are sensitive to ____________.
Give an example of chemotropism.
Study the diagrams given below and answer the following questions:
- Name the structures shown as X and Y in the figures (A) and (B), respectively.
- Write the functions performed by the structures X and Y.
- Name the phenomenon depicted and define it.
- How do the structures X and Y differ from each other?
- Give examples of the plants which show the said phenomenon.
