After implantation,finger-like projections on the trophoblast are called $...A....$ which are surrounded by $...B..$ and maternal blood. Here $A$ and $B$ refers to

  • A
    $A-chorion; B-foetal\; cell$
  • B
    $A-chorionic\; villi; B-uterine\; tissue$
  • C
    $A-uterine\; tissue; B-chorionic\; villi$
  • D
    $A-foetal\; cell; B-chorion$

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Where does fertilization of the ovum occur to make pregnancy possible?

Which one of the following develops from the trophoblast?

Cleavage is a method of division of a fertilized egg in which the egg:

Site of fertilization in a mammal is ......

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