In early haemopoietic tissue of embryo, there is
Chorion
Amnion
Allantois
Yolk sac
Meiosis can be observed in
Which type of stimulus is used to achieve parthenogenic development
Neural crest cells break off from the ________ and later move to the sides of the developing embryo to form ________
$A$ : Development is the emergence of a multicellular organism from a single group of cells.
$R$ : Development involves growth, differentiation and morphogenesis.
Spermatogenesis is induced by