Water and waste exit a sponge through its:

The basic structure of the coral organism is:

The stinging cells of a jellyfish are called:

Animals that do not have backbones are

An invertebrate with stinging cells and a central body cavity

An animal with a soft, unsegmented body often protected by a hard shell:

An asymmetrical animal without tissues or organs:

Hard outer covering is called an:

An internal skeleton is called an:

The level of organization cnidarians have is...

Porifera and Cnidaria can reproduce asexually through a process called...

What creates the flow of water in a sponge?

Cnidaria means ____ cells.

To which phylum does the planarian in the picture belong?

Roundworn

Tapeworm

Except for the octopus and squid, most mollusks have what?