MCQ
Phototropic movements in plants are due to?
- AAuxin
- BGibberellins
- CCytokinin
- DAbscisic acid
✓
Answer
- Auxin
Explanation:
Auxin is the phytohormone that handles apical dominance and positive phototropism.
It can cause the cells to elongate on the shaded side, so this side grows more.
This unequal growth of the two sides results in the stem's growth towards the light.
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