Which layer of the embryo is formed first?

Ectoderm

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Mesoderm

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Endoderm

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Both B and C

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Solution

The correct option is C Endoderm
There are either two or three germ layers observed in organisms in which the outer layer endoderm emerges first and ectoderm which is the inner layer form after it and interactions between the two germ layers induce the development of mesoderm known as the middle layer in higher organisms.
So the correct option is 'Endoderm'.

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