AP BIOLOGY

Detailed explanation-1: -cnidarian, also called coelenterate, any member of the phylum Cnidaria (Coelenterata), a group made up of more than 9, 000 living species. Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans.

Detailed explanation-2: -Cnidarians perform extracellular digestion, with digestion completed by intracellular digestive processes. Food is taken into the gastrovascular cavity, enzymes are secreted into the cavity, and the cells lining the cavity absorb the nutrient products of the extracellular digestive process.

Detailed explanation-3: -Cnidaria are all eukaryotic, as are all other animals. The only types of prokaryotes that exist are bacteria and archaea, all other organisms from protists, to plants, to fungi, to animal are eukaryotes and contain mitochondria and other membrane-bound organelles.

Detailed explanation-4: -Domain Eukarya: This box jellyfish is a eukaryote because its cells have membrane bound organelles and a true nucleus.