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Question

In sponges, various types of body cells obtain nourishment from

A
Choanocytes
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B
Trophocytes
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C
Thesocytes
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D
Both B and C
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Solution

The correct option is D Both B and C
A. Choanocytes also called as collar cells are the specialised flagellated cells that form the inner layer of the body wall of sponges. This inner layer is also called as choanoderm. The movement of water initiated by the whipping motion of choanocytes helps in the digestive and respiratory functions of the sponge
B. Trophocytes are the cells in which digestion of food takes place. These cells are also called as nurse cells.
C. Thesocytes are the storage cells with food reserve and have lobose (i.e. bulbous, thick) pseudopodia.
Hence, in sponges, various types of body cells obtain nourishment from Trophocytes and Thesocytes. Thus, both options B and C are correct.
So, the correct answer is 'Both B and C'.

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