Which of these is used to control human population?
Oestrogen and progesterone
$IUCD$ and $MTP$
Tubectomy and vasectomy
All of the above
Atretic follicles are found in the
Which of the following undergoes spermiogenesis?
Type of placenta in the human is
When a small piece of dorsal lip of blastopore of frog's early gastrula is transplanted into another gastrula of similar age at ventral lip, the result is
Which one of the following parts serves the function of primary organizer in frog