The mammalian primitive streak gives rise to

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(D) The primitive streak is a structure that forms in the blastula during the early stages of embryonic development in amniotes (reptiles,birds,and ma

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Germ layers

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(D) The primitive streak is a structure that forms in the blastula during the early stages of embryonic development in amniotes (reptiles,birds,and mammals).It marks the beginning of gastrulation.During gastrulation,cells from the epiblast migrate through the primitive streak to form the three primary germ layers: the ectoderm,mesoderm,and endoderm.Specifically,the cells that ingress through the primitive streak primarily differentiate into the mesoderm and endoderm,while those that remain on the surface become the ectoderm.Therefore,the primitive streak is responsible for the formation of the germ layers.

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