Question

If a carmine particle is put just above the osculum of sponge

• A. It will be ingested and digested.
• B. It will be thrown away by ostia and then ingested.
• C. It will be thrown away.
• D. It remains where it was.

Answer 1

The correct option is C It will be thrown away.

Osculum is the opening in the body of the sponge through which water passes out from the body.
So, if carmine is placed on the osculum, it will throw it out from the body during excretion. Thus, the correct answer is option C.