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Question
Some flowers (e.g., Oxalis) open in the morning and close during evening because of
Some flowers (e.g., Oxalis) open in the morning and close during evening because of
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Solution
The correct option is B Photonasty
Nastic movements are responses of plant parts to stimuli. Photonastic movement is the nastic response of plant in response to light. Oxalis flowers open in the morning and close during evening because of photonasty. Phototropism is the growth of a plant part in response to light. Phototaxis is the movement of a plant part in response to light. Nyctinasty is the rhythmic nastic movement of plant in response to the onset of darkness. Thus, the correct answer is 'Photonasty'
Nastic movements are responses of plant parts to stimuli. Photonastic movement is the nastic response of plant in response to light. Oxalis flowers open in the morning and close during evening because of photonasty. Phototropism is the growth of a plant part in response to light. Phototaxis is the movement of a plant part in response to light. Nyctinasty is the rhythmic nastic movement of plant in response to the onset of darkness.
Thus, the correct answer is 'Photonasty'
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