(a) what is the basic unit functional unit of excretion in human explain the structure and functioning
(b) how are water and minerals transport in plants at night time when stomata is closed
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excretion is the process of removal of harmful
waste from the body of an organism
waste from the body of an organism
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the basic functional unit of excreation is nephron. without nephron lungs and skin also help in excreation.the unwanted material is when gone into large intestine then it absorve salt and residue material thrown out body . with the helph of sphicter muscle. 2) when the transpiration process occur then the lost water is replaced by the water from xylem vessles in the leaf .gradually it creats asuction which pulls water xylem to the cells of root which is turn absorve water.thus the pull due to transpiration helps in absorption and movement of water and dissolved minerals in tall plants during day when stomata are open.
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