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A.
cooling effect resulting from evaporation of water from the body surface
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B.
root hairs of a plant growing towards the source of light
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C.
changing of the body colour of chameleon to match the colour of the foliage on which it is resting
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D.
the release of phosphorus into the phloem of a plant growing in a phosphorus-deficient soil
Correct Answer: Option D
Explanation
Homeostasis is a living organism's way of maintaining a stable internal environment even in the event of external environmental changes. When the plant keeps supplying phosphorus to the phloem even in the case of a deficiency in the soil, it maintains a steady balance on its inside irrespective of the lack in the soil.
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