What type of skeleton do some cnidarians have?

Step-by-step solution

Cnidarians exhibit tissue level of organization and are diploblastic Cnidoblasts, also known as cnidocytes, contain stinging capsules or nematocysts and are used for anchorage, defense, and prey capture in cnidarians.They have a central gastro-vascular cavity with a single opening, mouth on hypostome. Digestion is extracellular and intracellular. Some of the cnidarians, e.g., corals have a skeleton composed of calcium carbonate. Cnidarians exhibit two basic body forms called polyp and medusa (Figure 4.6). The forme