Question

pretest: organization of organisms
match the characteristics to the correct phylum.
organisms lack symmetry organisms have specialized stinging cells adult forms are sessile
two types of body plans exist—polyp and medusa organisms obtain food by filtering water phenomenon of alternation of generation is observed
cnidaria porifera

Explanation:

• Cnidaria: These organisms (like jellyfish, corals) have radial symmetry, specialized stinging cells (cnidocytes), two body plans (polyp and medusa), show alternation of generations, and some adult forms are sessile (e.g., corals).
• Porifera: These are sponges, which lack symmetry, filter water to obtain food, and are sessile as adults.

Answer:

Cnidaria	Porifera
two types of body plans exist—polyp and medusa	organisms obtain food by filtering water
phenomenon of alternation of generation is observed	adult forms are sessile