Kangaroos are mammals that lack a placenta. Therefore, they must have an alternate way of supplying the developing embryo with

Question

Rowan Tucker

Biology

11 April, 22:08

Kangaroos are mammals that lack a placenta. Therefore, they must have an alternate way of supplying the developing embryo with

+5

Answers (2)

Know the Answer?

Rebecca · Answer 1

nutrients all mammals need nutrients

Tristian Nicholson · Answer 2

Answer: yolk sac

explanation:

the placenta does not develop for a long time so the alternate way of supplying the developing embryo is through the yolk sac which the embryo can receive nutrients and respiratory gas exchange through which the placenta will be formed later.