In human all the three germ layers are originated from
Trophoblast cells
Inner cell mass
Both $(a)$ and $(b)$
They have special lineage
Which one of the following parts serves the function of primary organizer in frog
Which of the following layers in an antral follicle is acellular?
If the nuclei from an $8$-celled stage of an embryo are transplanted into enucleated eggs, which of the following events is likely to occur
Which of the following is an embryonic connective tissue
The signals for parturition originates from the fully developed foetus and followed by placenta causing the mild contractions called