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प्रश्न
What is meant by positive and negative tropic movements in plants? Explain them by giving suitable examples.
उत्तर
Positive tropic movements in plants:
Directional movement of a plant part towards the stimulus is called positive tropic movement.
Examples:
- Growth of shoots towards light
- Growth of roots towards gravity
- Growth of roots towards water
Negative tropic movements in plants:
Directional movement of a plant part away from the stimulus is called negative tropic movement.
Examples:
- Growth of roots away from light
- Growth of shoots upwards and away from gravity
- Growth of shoots away from water
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संबंधित प्रश्न
What is the scientific name of sensitive plant?
What does a stem (or shoot) do in response to light? What is this phenomenon known as?
Define chemotropism.
Name the plant organ which is positively phototropic.
Name the plant organ which is negatively geotropic.
A big tree falls in a forest but its roots are still in contact with the soil.
The branches of this fallen tree grow straight up (vertically). This happens in response to ______.
Name the stimulus which causes the following movements in plants.
phototropism, thigmotropism, hydrotropism and geotropism
The tropic movement that helps the climbing vines to find a suitable support is ______.
Response of plant roots towards water is called:
Which parts of a plant exhibit Positive hydrotropism?
