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In Amoeba, a single cell carries out all the functions of the body . In Hydra, groups of cells work togetherto perform specific functions like respiration, excretion , nutrition , reproduction

Hydra - Multicellular Organisation


What does this mean?


This means that a particular function is carried out by a cluster of cells at a definite place in the body. This cluster of cells is called tissue and this has to function with high efficiency.


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