In which of the following the placenta forms an important structure in development
Amphibian
Reptiles
Birds
Mammals
The hormone released from placenta is
The extra structure that provides nutrition to the embryo is
During the course of development, cells in various regions of embryo become variable in morphology and eventually perform diverse functions. This process is known as
Which one of the following statements with regard to embryonic development in humans is correct?
It is structural and functional unit between developing embryo (Foetus) and maternal body