MCQ
Melotic division of the secondary oocyte is completed
- ✓At the time of fusion of a sperm with an ovum
- BPrior to ovulation
- CAt the time of copulation
- DAfter zygote formation
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$I$. They inhibit ovulation and implantation
$II$. They alter the quality of cervical mucous to prevent or retard the entry of sperms
$III$. They prevent the ejaculated semen from entering the female vagina
$IV$. They inhibit spermatogenesis
$II.$ Chemical theory of origin of life was given by $....B......$