Which term describes the structure cnidarians use to capture prey?

Which term describes the structure cnidarians use to capture prey?

• A. Spicules
• B. Nematocyst
• C. Embed
• D. Polyp

Answer: (B)

Cnidarians capture prey using specialized stinging capsules called nematocysts, housed within cnidocytes. When triggered, a nematocyst erupts a tiny, harpoon-like thread that can inject venom and entangle or paralyze the prey, drawing it toward the animal's mouth. This mechanism is distinctive to cnidarians and is exactly what allows them to seize prey effectively in the water. Spicules are hard structural elements found in some sponges and corals, not the prey-capturing tool used by cnidarians. A polyp is a body form, not the capturing structure itself. The term described here refers to the capture apparatus, so it fits best.

Cnidarians capture prey using specialized stinging capsules called nematocysts, housed within cnidocytes. When triggered, a nematocyst erupts a tiny, harpoon-like thread that can inject venom and entangle or paralyze the prey, drawing it toward the animal's mouth. This mechanism is distinctive to cnidarians and is exactly what allows them to seize prey effectively in the water. Spicules are hard structural elements found in some sponges and corals, not the prey-capturing tool used by cnidarians. A polyp is a body form, not the capturing structure itself. The term described here refers to the capture apparatus, so it fits best.