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प्रश्न
When the leaves of a sensitive plant are touched with a finger, they fold up and when light fades at dusk, the petals of a dandelion flower close.
state two ways in which the above two processes differ.
उत्तर
The first process of folding up of leaf is thigmonastic and the stimulus is touch. The second process of closing of petals is photonastic and the stimulus is light.
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संबंधित प्रश्न
What is the stimulus in geotropism?
What does a stem (or shoot) do in response to light? What is this phenomenon known as?
To which directional stimuli do roots respond?
What is meant by positive tropism and negative tropism? Explain with examples.
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 |
State whether true or false. If false, correct the statement.
Shoot is positively phototropic and negatively geotropic.
Name the part of plant which shows positive geotropism. Why?
The movement of sunflower in accordance with the path of sun is due to
The height of a plant is regulated by ______.
Give one example of geotropism.
