Question

why is the regeneration not possible in complex organisms​

Answer 1

Answer

Body of most of the multicellular organismshave different and varied cells, so it is not possible for animals to regenerate because the cells or tissues which make up their internal body parts that exactly same cells arenot possible to reproduce.

Answer 2

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Organisms with more complex cell structures cannot regenerate because each cell has a different function and has different tissue structures, like in human beings. So they can regenerate to form an entire human being as they don't have the information in the cells to regenerate.

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