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Home  >>  JEEMAIN and AIPMT  >>  Biology  >>  Reproduction
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Regarding inner cell mass - choose the correct option :


( A ) A mesoderm soon appears between the ectoderm and the endoderm.
( B ) The three layers - ectoderm, mesoderm and endoderm - give rise to all tissues in adults.
( C ) Immediately after implantation, the inner cell mass differentiates into an outer layer-ectoderm and an inner layer-endoderm.
( D ) all of the above

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1 Answer

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(D) is the right answer.

Immediately after implantation, the inner cell mass (embryo) differentiates into an outer layer called ectoderm and an inner layer called endoderm. A mesoderm soon appears between the ectoderm and the endoderm. These three layers give rise to all tissues (organs) in adults. It needs to be mentioned here that the inner cell mass contains certain cells called stem cells which have the potency to give rise to all the tissues and organs.
answered Apr 3, 2014 by pady_1
 

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