Which of the following labelled parts produces energy for the movement of the tail that facilitate sperm motility essential for fertilisation?
$A$
$B$
$C$
$D$
The estrous cycle occurs in
Stroma is a term applied to
Which one of the following parts serves the function of primary organizer in frog
If an unfertilized egg is pricked with a micro needle, it will
$A$ : Corticotrophin releasing hormone is a part of the clock that establishes the timing of birth.
$R$ : The signals for parturition originate from the fully developed foetus and placenta which induce mild uterine contractions called foetal ejection reflex.