Webbivalve (bī′vălv′) n. Any of numerous freshwater and marine mollusks of the class Bivalvia, having a shell consisting of two hinged valves connected by a ligament, and including the clams, mussels, oysters, and scallops. Also called lamellibranch, pelecypod. adj. 1. Having a shell consisting of two hinged valves. 2. WebApr 28, 2024 · Bivalve mollusks are a class of marine or freshwater organisms that have shells consisting of two hinged, bilaterally symmetrical halves; however, some species have secondarily lost their bilateral …

Phylogenetic Tree- Definition, Types, Steps, Methods, Uses

WebThe bivalve shell typically consists of two calcareous, convex valves that are hinged dorsally and free ventrally. The hinge margin is typically united by a non-calcified ligament and a set of articulating hinge teeth. The … Webbi•valve. n. 1. any mollusk, as the oyster or mussel, of the class Bivalvia, having hinged lateral shells, a soft body enclosed by a mantle, sheetlike gills, and often a retractile foot. … cst field monitor time domain

Bilateral Symmetry - Definition and Examples

WebBiology Department Home; Zoo-lab; Lab 6: Molluscs A page within Zoo-lab. 1. Taxonomy for Lab 6. ... Bivalve shells carry out a variety of functions including support for soft tissues, protection from predators, locomotion (in scallops) and boring tunnels through hard substrates (shipworms). The shell is made of three layers: the nacreous layer ... WebThe organisms belonging to phylum Mollusca exhibit the following characteristics: They are mostly found in marine and freshwater. Very few are terrestrial and found in moist soil. They exhibit organ system level of … WebThe siphon is part of the mantle of the mollusc, and the water flow is directed to (or from) the mantle cavity . A single siphon occurs in some gastropods. In those bivalves which have siphons, the siphons are … cst fft