McqMate
| Q. |
Phototropic movement is controlled by |
| A. | Auxin |
| B. | Gibberellin |
| C. | Cytolthiin |
| D. | Ethylene |
| Answer» A. Auxin | |
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Explanation: Phototropism is the growth of organisms in response to light. In plants, phototropism is a response to blue wavelengths of light and is caused by a redistribution of auxin from the illuminated side to the darker side of the shoot, resulting in quicker growth on the darker side and bending of the shoot toward the source of light. |
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