The concept that organiser is essential for embryonic development was given by or For the ‘Theory of organiser’, Nobel prize was given to
J. Axelrod
C. Landsteiner
H. Spemann
I.P. Pavlov
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
Endometrium is lining of
In humans, what is the ratio of the number of gametes produced from one male primary sex cell to the number of gametes produced from one female primary sex cell ?
Neural crest cells break off from the ________ and later move to the sides of the developing embryo to form ________
Mammalian embryo is directly surrounded by