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Question

Choanocytes are present in


A
Physalia 
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B
Sycon 
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C
Pleurobrachia 
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D
Echinus 
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Solution

The correct option is C Sycon 
Choanocytes or collar cells are characteristic cells of porifers/sponges. In sponges, canal and spongocoel are internally lined by choanocytes.
In options, Physalia belongs to cnidaria/coelenterata. Sycon belongs to porifera/sponges. Pleurobrachia belongs to ctenophora. Echinus is a sea-urchins and belongs to Echinodermata.
 

Biology

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