CBSE · Class 10 · Science · Control and CoordinationWhat is phototropism? How does it occur in plants?
Step-by-Step Solution
Phototropism is the directional growth movement of plant parts in response to light. It occurs due to the unequal distribution of auxin hormone in the plant stem; when light falls on one side, auxin diffuses towards the shaded side, stimulating faster cell elongation there and causing the stem to bend towards the light source.
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