Question

What is common in sponges having different types of canal system?

• A. Apopyle
• B. Paragastric cavity
• C. Prosopyle
• D. Radial chambers

Answer 1

The correct option is B Paragastric cavity

A. The openings of radial chamber into spongocoel are called apopyles.

B. Paragastric cavity or Spongocoel is the central cavity in the body of sponges which opens to outside through osculum. It is common in all sponges regardless of canal system.

C. The openings of incurrent canals into radial chambers are called prosopyles.

D. Radial chambers are the small radial or flagellated chambers in the body of sponges that are lined by choanocytes or collar cells.

So, the correct answer is 'Paragastric cavity'.