Question

Nematocysts are found in animals belonging to phylum

• A. Coelenterata
• B. Chordata
• C. Mammalia
• D. Reptilia

Answer 1

The correct option is A Coelenterata

Nematocysts are a type of Coelenterata, and it is the presence of cnidae that separates jellyfish and other cnidarians from other animals

Nematocyst, minute, elongated, or spherical capsule produced exclusively by members of the phylum Cnidaria (e.g., jellyfish, corals, sea anemones). Several such capsules occur on the body surface. Each is produced by a special cell called a cnidoblast and contains a coiled, hollow, usually barbed thread, which quickly turns outward (i.e., is everted) from the capsule upon proper stimulation. The purpose of the thread, which often contains poison, is to ward off enemies or to capture prey.