Which of the following organism is not triploblastic (1) Worms (2) Arthropods (3) Molluscs (4)Jellyfish

Answer: (4)Jellyfish

Jellyfish belong to the phylum Coelenterata; and thus is not triploblastic.


The group of Annelids has many worms. Their bodies are segmented and consist of 3 layers and hence called as Triploblastic animals. Triploblastic refers to having 3 layers as inner skin, middle skin and outer skin.


Earthworm, Sand worm, and Leech.

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