how does a sponge obtain food how does a planarian move

What is the difference between animals with radial symmetry and those with bilateral symmetry?.

Cnidarians typically are either polyps (e.g., Hydra) or medusa (e.g., jellyfishes) or alternate between these two forms, the polyp being an asexual state and the medusa being a sexual state.

Cnidarians and comb jellies have a radially symmetrical saclike body consisting of two tissue layers derived from the germ layers ectoderm and endoderm.

About 5,000 species of sponges are in the phylum Porifera.What makes up the 'skeleton' of sponges?.Because sponges are attached to the substrate, they can't move to a new location.What characteristics of sponges make them the only group of animals with a cellular level of organization?.They depend on a flow of water through the body to acquire food. Sponges have the cellular level of organization and lack tissues and symmetry.What characteristic of animals can lead to specialized body parts?.An animal is a _ if the first opening that appears in the embryo becomes the mouth and a _ if the first opening becomes the anus.What are the five criteria for classification of animals?.Animals are classified according to certain criteria, including type of coelom, symmetry, body plan, development, and presence of segmentation.Animals are multicellular heterotrophs that move about and ingest their food.Please change your browser preferences to enable javascript, and reload this page. You must have javascript enabled to view this website.

How does a sponge obtain food how does a planarian move