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P-2 Animal Classification — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10ScienceP-2 Animal Classification5 Marks
Question
Write short note: Germinal layers.
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Answer

  • During the initial embryonic period of any multicellular animal there is formation of germinal layers or germ layer.
  • These germ layers give rise to new tissues in the developing animal.
  • The primitive animals were diploblastic i.e. they have only two germ layers called ectoderm and endoderm.
  • The higher animals are triploblastic, having three germ layers; ectoderm, mesoderm and endoderm.
  • Cnidarians are diploblastic while all other animals are triploblastic.

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