Bivalves 0.0 / 5 ? GeologyF795A2/A-levelOCR Created by: Maria5Created on: 24-05-17 20:03 When did Bivalves first evolve? Cambrian 1 of 14 What phylum to Bivalves belong to? Mollusca 2 of 14 What class to Bivalves belong to? Bivalvia 3 of 14 What is the Umbo? Area of most curvature, marking the point of first growth 4 of 14 What are the Adductor Muscle scars? Where muscles are attached to the shell 5 of 14 What is the Pallial Line? The line that marks the limit of attachment of the soft tissue 6 of 14 What is the Ligament? What helps to hold the shells together 7 of 14 What is the Pallial Sinus? An indentation in the Pallial line, present only in genera with retractable siphons 8 of 14 What is the Hinge Line? The plane of symmetry where two valves are joined together 9 of 14 What is the Commisure? Where the left and right valves actually meet 10 of 14 What are is the Cardinal teeth? The raised area which fits into sockets on right valve, this allows articulation 11 of 14 What is the Socket? A depression which fits over cardinal teeth on the right valve 12 of 14 What is the shell itself secreted by? The mantle 13 of 14 What are Siphons? Soft tissue that take in fresh water and filter it and remove used water 14 of 14
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