Antifertilizins are contained in

  • A

    Spermatozoa

  • B

    Ovary

  • C

    Testis

  • D

    Germinal epithelium

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Human female reaches menopause at the age of about

Match the following with correct combination

Column $-I$ Column $-II$
$(a)$ Hyaluronidase $(i)$ Acrosomal reaction
$(b)$ Corpus luteum $(ii)$ Morphogenetic movements
$(c)$ Gastrulation $(iii)$ Progesterone
$(d)$ Capacitation $(iv)$ Mammary gland
(e) Colostrum $(v)$ Sperm activation

Extra embryonic membrane amnion is not found in amphibians because

Why do all copulations not lead to fertilisation and pregnancy? The root cause is _________.

Fleshy folds of tissue which extends down the mons pubis and surrounds the vaginal opening is called