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Human Reproduction

Question
CBSEENBI12047149

Which one of the following statement with regard to the embryonic development in humans is correct ?

  • Cleavage results in a hollow balls of cells called morula

  • Cleavage in mammalian ova is unequal holoblastic and horizontal

  • Rearrangement of blastomeres, a central cavity is formed inside the morula

  • Cleavage bring about considerable increase in the mass of protoplasm

Solution

C.

Rearrangement of blastomeres, a central cavity is formed inside the morula

Due to rearrangement of blastomeres, a central cavity is formed inside the morula. This sphere of cells with a cavity (blastodermic cavity) at the centre is called blastodermic vesicle (also called blastocyst).