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Does the occurrence of diversity of ani...

Does the occurrence of diversity of animals on earth suggest their diverse ancestry also? Discuss this point ih the light of evolution.

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Although animals have a vast diversity in structures they probably do not have a common ancestry, because common ancestry may greatly limit the extent of diversity. As many of these diverse animals are inhabiting the same habitat, their evolution by geographical isolation and speciation is also not likely. Thus, a common ancestry for all the animals is not the likely theory.
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