WebJan 10, 2024 · The pallial sinus is an etched “bent line” present on the inside of some bivalve shells, at their posterior end. The sinus is a continuation of the pallial line, a scar that indicates the limit of the bivalve body that is … WebMar 18, 2024 · Cluster of mussels on rocks at low tide (Source: esp2k via iStockphoto). Mussel body parts and functions. Mussels have soft inner bodies and hard outer shells called valves.Because mussels have two shells, they are known as bivalves (“bi” meaning two). Clams, oysters and scallops are also bivalves.

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WebSep 2, 2016 · Oysters, clams, mussels, scallops, cockles, coquinas, and many more are all part of the class Bivalvia. Most soft-bodied, aquatic animals with two shells fall into this group. Bivalves are... WebA. the extinction of the Mammoths due to hunting by a new predator. B. birds that evolve a new beak style in order to exploit a different food source. C. fossils of trilobites that have the same morphology but are separated by millions of years. D. the mass extinction of the dinosaurs due to a meteorite's impact 65 million years ago. imagination wc1e 7bl

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WebThe shell. The bivalve shell is made of calcium carbonate embedded in an organic matrix secreted by the mantle. The periostracum, the outermost organic layer, is secreted by the inner surface of the outer mantle fold at the mantle margin. It is a substrate upon which calcium carbonate can be deposited by the outer surface of the outer mantle fold. WebBivalve, Bivalves belong to the invertebrate phylum Mollusca, which also includes snails, squids, and octopuses. Some well-known bivalves include clams, scall… Grasshopper, Grasshoppers are plant-eating insects characterized by long hind legs designed for locomotion by jumping. Like all insects, the body of grasshoppers… Caddis Flies, North … A bivalve shell is part of the body, the exoskeleton or shell, of a bivalve mollusk. In life, the shell of this class of mollusks is composed of two hinged parts or valves. Bivalves are very common in essentially all aquatic locales, including saltwater, brackish water, and freshwater. The shells of bivalves commonly wash up on beaches (often as separate valves) and along the edges of lakes, rivers, and streams. Bivalves by definition possess two shells or valves, a "right valve" and a "lef… imagination weston super mare