Question

sponge knowledge check
wastes and excess water leave a sponge through an opening at the top called the

osculum
pores
porocyte
hole

Explanation:

Sponges are simple aquatic animals. Water enters through pores and exits through a large opening at the top called the osculum. Pores are small openings for water entry. A porocyte is a type of cell. "Hole" is a very general term not specific to sponge anatomy.

Answer:

osculum