ABC Book Revised
7th Grade-Ch. 2 Sec. 5 Echinoderms
1.What are the four classes of arthropods? 2.How do they differ? How are they similar? 3.What are the three parts of an insect? 4.What are the two parts.
Echinoderms. An echinoderm is a marine invertebrate of the phylum Echinodermata. Examples of echinoderms are sea stars, sea lilies, feather stars, brittle.
Phylum Echinoderm. Echinoderm Mostly sessil life Adult has no head or brain Central nervous system with nerves radiating into arms All marine Echinodermata.