Molluscs
- Grade Level: Senior High (10-12)
- Subjects: Biology
- Produced By: BioMedia Associates
- Year: 2000
- Country: United States
- Language: English
- Running Time: 15m
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Phylum Mollusca is the second most diverse phylum of animals, with over 100,000 known species. First examined are the basic characteristics of the phylum - a soft body, muscular foot, mantle cavity with gill, and hard calcified shell. The four most familiar classes of mollusks (chitons; gastropods, bivalves, and cephalopods) are studied in depth, viewing structure, life history, from the Burgess Shales in Western Canada, unfolding into the modern view of molluscan evolutionary relationships.