How many extra-embryonic membranes are formed around developing embryo of higher vertebrates?

Options :
  1. 1
  2. 2
  3. 3
  4. 4
Answer and Explanation :-

Answer: Option 4


Four foetal or extra-embryonic membranes namely amnion, chorion, allantois and yolk-sac are formed around developing embryo of higher vertebrates. Embryonic membranes are auxillary organs to protect the embryo and to provide its nutrition, respiration and excretion functions until the embryo develops fully and is capable of performing by its own.

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