The first evolved diploblastic, radially symmetrical animals with tentacles belong to the phylum _____.

Porifera

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Cnidaria

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Annelida

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Platyhelminthes

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Solution

The correct option is B Cnidaria
Animals belonging to the phylum Cnidaria are radially symmetrical and are diploblastic. They have a cylindrical or umbrella-like body. Most of these animals are marine. They possess cnidoblast bearing tentacles around the mouth. Tentacles are useful for capturing the prey.

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The first evolved diploblastic, radially symmetrical and sexually dimorphic animals with tentacles belong to the phylum _____.

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