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Standard XII

Biology

Different Tropic Movements

Effect of uni...

Question

Effect of unilateral irradiation can be eliminated by keeping the plant in a clinostat in

Horizontal position

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Vertical position

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Horizontal position and rotating it

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Vertical position and rotating it

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Solution

The correct option is D Vertical position and rotating it
Clinostat is the apparatus which is used to measure the rate of growth in plant. It uses rotation to neglate the influence of gravity on plant growth and development. To eliminate the effect of unilateral irradiation, plant is kept in vertical position in a clinostat. The rotation will provide the uniform effect on plant growth and development by neglecting gravitation and unilateral irradiation on one side.
Thus, the correct answer is option D.

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