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Question

Which part of Sponge corresponds to the mouth of other animals?

A
Osculum
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B
Incurrent canal
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C
Ostia
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D
Excurrent canal
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Solution

The correct option is C Ostia
All sponges have ostia, which corresponds to the other animals mouth. The sponges are covered with tiny pores on the outside, called as ostia. The ostia are channels leading to the interior through the mesohyl and in most sponges, these are controlled by tube-like porocytes, that form closable inlet valves.
So, the correct answer is option C.

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