Cnidarians have multiple body openings that are surrounded by a ring of stinging cells.
Cnidarians have a single body opening that is usually surrounded by a ring of stinging cells.
Sea fans and jelly fish are cnidarians
Alternatives B and C are correct
Mollusks are vertebrates
Mollusks have hard bodies and shells
Mollusks have soft bodies and hard shells
Some examples of mollusks are jelly fish and star fish
Earthworms and leeches are Annelids
Annelids have bodies that are divided into segments
Annelids may also be called segmented worms
All of the alternatives are correct
Arthropods are organisms with segmented bodies and skeletons in the inside of their bodies.
Insects, spiders, crabs, millipedes and centipedes are all arthopods.
Arthropods include 25% of animal species.
All arthropods have 6 legs
Sea stars and sea urchins are not examples of echinoderms.
Not all echinoderms live in the ocean.
Echinoderms have spines or legs that radiate from the center of their body.
Echinoderm bodies have a unique three-part balanced arrangement of parts.
Tarantulas are chordates.
Chordates are animals that do not have a backbone.
Animals from the Chordate Phyla are simple and underdeveloped.
Chordates have interior skeletons, bilateral symmetry and more advanced brains.