Placenta has an outer layer which is selectively permeable and hormone secreting which is known as
Trophoblast
Chorion
Amnion
Mesoderm
It's Obvious
In mammals the estrogens are secreted by the Graafian follicle from its
The extra-embryonic membranes of the mammalian embryo are derived from
If both ovaries are removed from pregnant human female in first trimester of pregnancy then it will lead to
Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelled $A, B, C, D.$
Type of cleavage found in mammals is
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