Question

1. what is the name of the large openings of the sponge through which water and other wastes exit?

○ ostia
○ choanocytes
○ oscula
○ amoebocytes

Explanation:

To solve this, we analyze each option:

• Ostia are the small openings through which water enters the sponge, not exits.
• Choanocytes are collar cells in sponges that help with feeding and water movement, not the exit openings.
• Oscula are the large openings in sponges through which water and wastes exit.
• Amoebocytes are cells in sponges that perform various functions like digestion and structure, not exit openings.

Answer:

C. oscula