Human Reproduction Question 81
81. Extra-embryonic membranes of the mammalian embryo are derived from
(a) inner cell mass
(b) trophoblast
(c) formative cells
(d) follicle cells
Show Answer
Answer : b
Hints & Solutions
(b) Four extra-embryonic membranes are present in mammals which originally arise from trophoblast viz. amnion, chorion, allantois and yolk sac. The trophoblast is the outermost layer of cells in morula.
