Examine the chart giving information about invertebrates. The variety of invertebrates is great. They are divided into twelve phyla. Three phyla are shown.
 | 1.Porifera Sponges. Simplest of all animals; adults attatched to rocks and cannot move. |
 | 2. Cnidaria Hydras, jellies, sea anemones, corals. Live in water; some attach to rocks; have tentacles and stinging cells around mouth. |
 | 3. Arthropoda (arthropods) Insects, spiders, scorpions, lobsters, shrimp. Live in water and on land; have an exoskeleton and jointed legs. There are about 1,000,000 species. |
Answer these questions about the chart above.
1. Where do Cnidaria live? ________________________________________________________________________
2. Which animals are the simplest of all animals? ________________________________________________________________________
3. What are some of characteristics of Cnidaria? ________________________________________________________________________
4. What are some of the characteristics of the members of the phylum Arthropoda? ________________________________________________________________________________________________________________________________________________
5. About how many species are there of Arthropoda? ________________________________________________________________________