Origin of nephridia in earthworm is

Ectodermal

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Endodermal

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Mesodermal

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None of the above

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Solution

The correct option is A Ectodermal
Earthworms are triploblastic and they have three prominent germ layers known as endoderm, mesoderm and ectoderm. The nephridia occur in pairs and performs a function similar to the vertebrate kidney. They remove metabolic wastes from an animal's body. The nephridia of the earthworm are of ectodermal origin. So, the correct answer is option A.

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