In a specimen-based viva, the examiner describes this case: between the outer and inner cell layers of a sponge lies a gelatinous matrix containing amoeboid cells and skeletal elements. Choose the concept that fits it best.

Correct Answer: C

mesohyl

Mesohyl is the gelatinous matrix inside sponge bodies. It contains archaeocytes, spicules, spongin fibers, and other cells, supporting the sponge body without forming true tissues. This MCQ belongs to the Porifera topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.