NEET BIOLOGY

Detailed explanation-1: -All Cnidarians have tentacles with stinging cells in their tips which are used to capture and subdue prey.

Detailed explanation-2: -All cnidarians are carnivorous predators. Jellyfish capture small drifting animals with their stinging cnidocyte-filled tentacles. Even the sessile coral polyps and sea anemones are predators ready to sting prey, grasp it in their tentacles, and push it into their mouth.

Detailed explanation-3: -Cnidarians contain specialized cells known as cnidocytes (“stinging cells”) containing organelles called nematocysts (stingers). These cells are present around the mouth and tentacles, and serve to immobilize prey with toxins contained within the cells.

Detailed explanation-4: -As eversion and twisting proceed, the barbs act like a drill, penetrating into (and pulling the thread into) the foreign object. If a toxin is present, it passes through the hollow thread, penetrating and paralyzing the victim’s tissues.

Detailed explanation-5: -Nematocysts or cnidocysts represent the common feature of all cnidarians. They are large organelles produced from the Golgi apparatus as a secretory product within a specialized cell, the nematocyte or cnidocyte. Nematocysts are predominantly used for prey capture and defense, but also for locomotion.