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Biology · ANIMAL KINGDOM

हिन्दी

A true coelom is defined as a fluid-filled body cavity that is lined completely by which embryonic germ layer, and in which phylum is a pseudocoelom observed?

  1. Lined by Mesoderm; Pseudocoelom found in Aschelminthes
  2. Lined by Ectoderm; Pseudocoelom found in Annelida
  3. Lined by Endoderm; Pseudocoelom found in Platyhelminthes
  4. Lined by Mesoglea; Pseudocoelom found in Coelenterata

Correct answer · Option 1

Lined by Mesoderm; Pseudocoelom found in Aschelminthes

Explanation

The body cavity lined by mesoderm is called a true coelom. In Aschelminthes, mesoderm is present as scattered pouches between ectoderm and endoderm, forming a pseudocoelom.
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