NCERT · 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.
💡 Study Guide: This question tests core syllabus concepts from Control and Coordination. For formulas, key summaries, and mock exam reference guides, read the full Control and Coordination Revision Notes.