(a) What does a plant root do in response to water? What is this phenomenon known as?
(b) What happens to the moonflower (i) during daytime, and (ii) at night? What is this phenomenon known as?
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(a) the root grows towards the source of water.. this phenomenon is known as positive hydrotropism
(b) the moon flower opens only in the presence of moonlight... this phenomenon us photo nasty
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