Organisms which circulate water from their surrounding through their body cavities to facilitate the cells to exchange the substances are |
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a) |
Porifera |
b) |
Sponges |
c) |
Both (a) and (b) |
d) |
None of the above |
Organisms which circulate water from their surrounding through their body cavities to facilitate the cells to exchange the substances are |
|||||||
a) |
Porifera |
b) |
Sponges |
c) |
Both (a) and (b) |
d) |
None of the above |
(c)
All living cells have to be provided with nutrients, and other essential substances. Also the waste or harmful substances produced have to be removed continuously. Different group of animals have evolved different method for this transport. Simple organism like sponges and coelenterates circulate water from their surroundings through their body cavities to facilitate the cells to exchange these substances