■ preserved sea star

■ preserved sea urchin

■ dissection tray

■ fine dissection scissors with pointed blades

■ hand lens or dissecting microscope

■ dissection pins

■ household bleach


1. List the major characteristics of echinoderms.

2. Which feature of echinoderms gives their phylum its name?

3. To which classes of echinoderms do sea stars and sea urchins belong?

4. What is pentaradial symmetry?

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