First slide

Classification of Animals

Question

Which of the following set of cnidarians or corals have skeleton composed of calcium carbonate?

Easy

A

Aurelia, Obelia, Physalia
B

Pennatula, Gorgonia, Meandrina
C

Hydra, Adamsia, Porpita
D

Velella, Physalia, Hydra

Solution

Pennatula, Gorgonia, Meandrina are set of cnidarians which are all corals.

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