Question

Which two of the following are found in the mesophyll or protein matrix and serve as structural support for a sponge?

• A. Spicule, spongin
• B. Osculum, spicule
• C. Medusa, polyp
• D. Polyp, osculum

Answer 1

The correct option is A Spicule, spongin

Spongin is a protein found in the inside layer of a sponge. Spicule and spongin help in its structural support.

Osculum is the aperture in a sponge from where water goes out.

Medusa and polyp are two types of body shapes of Cnidaria, which includes jellyfish, sea anemones, corals and hydrozoans. Medusa has an umbrella shape. Polyp is umbrella in shape also but inverted. Both medusae and polyps have gastrovascular cavities, tentacles and a mouth.