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Diversity in Living Organisms — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceDiversity in Living Organisms1 Mark
MCQ
The distinguishing features of a Nematode are:
  • A
    Triploblastic, pseudocoelomate and flame cells.
  • B
    Triploblastic, flame cells and cylindrical body.
  • ✓
    Triploblastic, pseudocoelomate and cylindrical body.
  • D
    Diploblastic, pseudocoelomate and flame cells.
✓

Answer

Correct option: C.
Triploblastic, pseudocoelomate and cylindrical body.
Nematode worms are extremely abundant; often, several hundred species, and as many as a million individuals, inhabit a square yard of soil.
Roundworms have a round body because they have a partial fluid$-$filled body cavity $($pseudocoelom$).$ This is one way that roundworms differ from flatworms. Another way is their complete digestive system. Roundworms have a tough covering of cuticle on the surface of their body.

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