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The following figure shows a foetus with...

The following figure shows a foetus within the uterus. On the basis of the given figure, answer the questions that follow:

(a) In the above figure, choose and name the correct part (A, B, C or D) that act as a temporary endocrine gland and substantiate your answer. Why is it also called the functional junction?
(b) Mention the role of B in the development of the embryo.
(c) Name the fluid surrounding the developing embryo. How is it misused for sex-determination?

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