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Question
The response of plants to gravity is known as geotropism. How are plant parts sensitive to gravity? Describe with the help of a diagram.
Solution
The response of plants to gravity can be observed in the laboratory when the seedlings are placed in a pot filled with moist soil.
Roots of plants show positive geotropism which means that they grow in the direction of gravity in the downward direction. This movement is good for the growth of the seedling. The roots need to grow downwards in the soil in search of water and minerals.
Shoots of plants show negative geotropism which means that they grow against the direction of gravity in the upward direction. This movement is beneficial for the elongation of the plant. The shoots need to grow upwards in the direction of sunlight so that the plant can grow in height.
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