Answer
Sponges: Sponges lack symmetry, organs, mobility and germ layers. They are sessile filter feeders and are among the least advanced of all animals.
Ctenophores: These are comb jellies that are related to jellyfish. They have radial symmetry and some demonstrate bioluminescence.
Placozoans: Placozoans lack symmetry and true tissues, inhabiting aquatic or marine habitats. They appear to be tiny patches of cells with no distinguishable form.
Cnidarians: The cnidarian phylum includes jelly fish and anemones. They are radially symmetrical.
Work Step by Step
Sponges: Sponges lack symmetry, organs, mobility and germ layers. They are sessile filter feeders and are among the least advanced of all animals.
Ctenophores: These are comb jellies that are related to jellyfish. They have radial symmetry and some demonstrate bioluminescence.
Placozoans: Placozoans lack symmetry and true tissues, inhabiting aquatic or marine habitats. They appear to be tiny patches of cells with no distinguishable form.
Cnidarians: The cnidarian phylum includes jelly fish and anemones. They are radially symmetrical.
