Question

If a food particle is placed near the osculum of a sponge then it will

• A. Be thrown away
• B. Be ingested
• C. Rotate round osculum
• D. Be ingested first and then thrown out through ostia

Answer 1

The correct option is A Be thrown away

The osculum is an excretory structure in the living sponge. It is a large opening to the outside through which the current of water exits after passing through the spongocoel. So, if a food particle is kept in front of the spongocoel, it will be excreted or expelled or thrown out.

So, the correct answer is option A.