Biology (NTSE/Olympiad)  

4. Diversity In Living Organism

Phylum - Aschelminthes or nematoda

Phylum - Aschelminthes or nematoda
They are parasitic or free-living.
They are triploblastic, unsegmented and show bilateral symmetry.
Body cavity is not a true coelom.
Alimentary canal is complete.
Sexes are separate.

Examples : Ascaris (Round worm), Enterobius (Pin worm), Wuchereria (filaria worm)

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