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In which one of the following groups an animals are hermaphroditeA. Hydea, Ascaris, PheretimaB. Hydra, Homo sapiens, LeechC. Tapeworm, Toad, StarfishD. Hydra, Leech, Tapeworm |
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Answer» Correct Answer - D Water vascular system or ambulacral system is a unique system of echinoderms which helps mainly in locomotion. It is infact a modified part of coelom consisting of a system of canals containing sea water and amoeboid corpuscles. It helps in locomotion by providing a hydraulic pressure mechanism of tube feet may serve for respiratory exchange of gases. Tube feet also help in anchoring the body to substratum and in capturing and handling the food. |
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