In the given figure, what does the part labeled "a" represent?

  • A
    Ectoderm
  • B
    Mesoderm
  • C
    Mesoglea
  • D
    Endoderm

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Similar Questions

When the body is externally and internally divided into segments,it is called

Match the following columns:
Column-$I$Column-$II$
$P$. Asymmetry$I$. Coelenterates,Ctenophores,Echinoderms
$Q$. Radial symmetry$II$. Poriferans
$R$. Bilateral symmetry$III$. Annelids,Arthropods,Chordates

In the given chart, what do "a" and "b" represent respectively?

What is the basis of animal classification?

Radial symmetry is often exhibited by animals having

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