In frog chromosome no. is reduced to half
When $2^{nd}$ polar body is separated
When $2^{nd}$ polar body is divided
When $3^{rd}$ polar body is separated
When $1^{st}$ polar body is separated
Function of allantois in mammal is
After gastrulation the roof of archenteron is formed by
Identify the correct statement on ‘inhibin’.
$A$ : Blastocyst undergoes gastrulation to produce the three germinal layers.
$R$ : This involves cell movements (morphogenetic movement) that eventually help to attain new shape and morphology of embryo
Give scientific reasons : When male excites sexually epididymis wall shrinks / contracts.