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Question

Name a tropic response.


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Solution

Tropism:

Tropism simply means the movement of the plant in response to the stimulus present in the environment, this movement is in response to root and shoot growth.

There are 5 types of tropic movement:

  1. Phototropism - It is the movement of a plant in response to light, they will grow towards the direction of the light.
  2. Geotropism - the movement of the plant in response to gravity, they will move in the direction of gravity.
  3. Chemotropism - In seed plants, the movement of pollen grains to the female gamete is due to the secretion of chemicals.
  4. Hydrotropism - It is the movement of plants in response to water, the roots of the plant will grow towards the area where water is present.
  5. Thigmotropism - It is the movement or action of reflex of a plant in response to the touch.

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