Peristome teeth of moss show:

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(B) The peristome teeth of mosses exhibit a movement known as $Xerochasy$. These teeth are hygroscopic in nature. When the capsule is dry,the teeth be

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Xerochasy

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(B) The peristome teeth of mosses exhibit a movement known as $Xerochasy$. These teeth are hygroscopic in nature. When the capsule is dry,the teeth bend outward to facilitate the dispersal of spores. When the capsule is wet,they curve inward to protect the spores. Therefore,the movement related to the drying of the capsule is termed $Xerochasy$.

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