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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9

Differentiate phototropism from photonasty. - Science

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Question

Differentiate phototropism from photonasty.

Distinguish Between
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Solution

Sr. No. Phototropism Photonasty
1. The unidirectional movement of a plant part to light stimulus is called phototropism. It is slow and irreversible. The non-directional movement of a plant part in response to light is called photo nasty. It is immediate, temporary and reversible.
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Chapter 19: Plant Physiology - Exercise [Page 231]

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Samacheer Kalvi Science [English] Class 9 TN Board
Chapter 19 Plant Physiology
Exercise | Q V. 3. | Page 231
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