Question

Which of the following structure is not found in the mesenchyme layer of organisms belonging to phylum Porifera?

• A. Amoeboid cells
• B. Spicules
• C. Spongocoel
• D. Spongin fibres

Answer 1

The correct option is C Spongocoel

The two outer layers of cells in sponges are separated via an acellular mesenchyme. It is a gel layer that consists of spicules, spongin fibers, and ameboid cells. This layer is not directly connected to the spongocoel which is lined with choanocytes that are specialized digestive cells.

So, the correct answer is 'Spongocoel'.