special execretory organs are absent in
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There are certain soft bodied animals like sponges, coelenterates and echinoderms in which there are no special excretory organs. The nitrogenous waste and water are removed from body surface.
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There are certain soft bodied animals like sponges, coelenterates and echinoderms in which there are no special excretory organs. The nitrogenous waste and water are removed from body surface.
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