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
The foetal membrane which is the source of first blood corpuscle to enter the circulation of the embryo is called
Given below is a diagrammatic sketch of a portion of human male reproductive system. Which of the following part contributes to the maximum portion of semen?
Saheli is a
Germinal epithelium gives rise to
Archenteron is lined with