In the embryonic development of chordate the animal pole forms one of the following of the adult
Dorsal side
Ventral side
Head
Tail
Eggs of reptiles and birds are
How many eggs will be formed from $100$ primary oocytes
Given below is an incomplete flow chart showing influence of hormones of gametogenesis in human females. $A, B, C$ and $D$ in the chart refers to
$A$ : Development is the emergence of a multicellular organism from a single group of cells.
$R$ : Development involves growth, differentiation and morphogenesis.
$A$ : Fertilin protein is present in the egg membrane.
$R$ : It helps in agglutination reaction