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Question

Which of the following is NOT applicable to phylum coelenterata?


A

Coelenteron

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B

Choanocytes

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C

Nematoblasts

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D

Radial symmetry

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Solution

The correct option is B

Choanocytes


Coelenterates have the following characteristics

Habitat: aquatic, mostly marine.

Habit: solitary or colonial.

Symmetry: radially symmetrical.

Grade of organization: tissue grade of organization.

Germ layer: diploblastic, outer ectoderm and inner endoderm.

Whereas presence of choanocytes or collar cells is a characteristic feature of the phylum Porifera


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