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Question
A potted plant having straight parts A and B was placed horizontally on its side as shown in Figure (i). After a few days, it was observed that parts A and B of the plant acquired new positions as shown in Figure (ii).
- Name the phenomenon exhibited by the position of plant parts A and B in Figure (ii).
- Name the stimulus (other than sunlight) which causes plant part A to grow and bend upwards, and plant part B to bend downwards.
Solution
- The phenomenon exhibited by the positions of plant parts A and B is geotropism.
- The stimulus which causes plant part A to grow and bend upwards and part B to bend downwards is gravity.
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