The chemical fertilizer is present in

  • A

    Ovum

  • B

    Sperm

  • C

    Immature ovum

  • D

    Fertilized ovum

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Which of the following is the group of external genitalia in human female?

Which of the following is the endocrine tissue of testes

Vaginal orifice, urethral orifice are open in

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

The disadvantage of parthenogenesis is