A triploblastic invertebrate with a hard calcareous shell belongs to phylum X . Mostly they are bilaterally symmetrical, though there are a few exceptions. Identify X.

Annelida

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Arthropoda

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Echinodermata

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Mollusca

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Solution

The correct option is D Mollusca
Phylum Mollusca includes organisms that are triploblastic and posses a hard calcareous shell. This shell is secreted by mantle and may be internal, external or even absent. Except animals like snails exhibit bilateral symmetry.

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A triploblastic invertebrate with a hard calcareous shell belongs to phylum X . Mostly they are bilaterally symmetrical, though there are a few exceptions. Identify X.

The correct option is D MolluscaPhylum Mollusca includes organisms that are triploblastic and posses a hard calcareous shell. This shell is secreted by mantle and may be internal, external or even absent. Except animals like snails exhibit bilateral symmetry.

The correct option is D Mollusca
Phylum Mollusca includes organisms that are triploblastic and posses a hard calcareous shell. This shell is secreted by mantle and may be internal, external or even absent. Except animals like snails exhibit bilateral symmetry.