Question

what is the name given to the stinging cells on cnidarians that are used for defense and to capture prey?
cnidocytes
spicules
spongocytes

Explanation:

Cnidocytes are specialized cells unique to cnidarians (like jellyfish, corals). They contain nematocysts (stinging structures). When triggered (e.g., by contact with prey or a threat), nematocysts evert to release a stinging thread. This helps in capturing prey (by immobilizing it) and defense (by deterring predators). Spicules are structural elements in sponges (not for stinging). Spongocytes are cells in sponges related to spicule formation. So, the correct term for stinging cells in cnidarians is cnidocytes.

Answer:

cnidocytes