Blastocyst is a modified blastula of

  • A

    Placental mammals

  • B

    Frog

  • C

    Fish

  • D

    Birds

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Write a note on pregnancy and embryonic development in human beings.

Which one of the following statements about human sperm is correct?

  • [AIPMT 2010]

Where does fertilisation take place in human beings ? What changes occur in egg cell (ovum) during fertilisation ?

A sperm without acrosome, cannot