what is phototropism?
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Answers
Answer:
Phototropism is the growth of an organism in response to a light stimulus. Phototropism is most often observed in plants, but can also occur in other organisms such as fungi. The cells on the plant that are farthest from the light have a chemical called auxin that reacts when phototropism occurs.
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Answer:Phototropism is a directional response that allows plants to grow towards, or in some cases away from, a source of light.
Explanation
Key points
Plants have a variety of developmental, physiological, and growth responses to light—sometimes only to particular wavelengths of light.
In phototropism a plant bends or grows directionally in response to light. Shoots usually move towards the light; roots usually move away from it.
In photoperiodism flowering and other developmental processes are regulated in response to the photoperiod, or day length.
Short-day plants flower when day length is below a certain threshold, while long-day plants flower when day length is above a certain threshold.
In many plants, photoperiodism is controlled by the overlap between the day length cue and the plant's internal circadian rhythms.
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