Exempt Employees and Nonâexempt Employess. Some of the most significant class action lawsuits have been the result of an employer's misclassâification of nonexempt employees as though they were exempt from California overtime.
Bivalvia is a class of mollusks that all have two shells. It includes the clams, oysters, scallops and mussels. There are over 20,000 species of bivalves around the world, and probably thousands not yet discovered.Nearly all of them live in salt water, but a few groups have evolved to live in freshwater.Bivalves have two shells that they can close together tightly for protection, with their whole body inside.here are over 20,000 species of bivalves around the world, and probably thousands not yet discovered. Nearly all of them live in salt water, but a few groups have evolved to live in freshwater. Bivalves have two shells that they can close together tightly for protection, with their whole body inside.
Bivalve molluscs are so-called because their shell is divided into two articulated valves (compare them to gastropods and cephalopods, which are also molluscs). In large bivalves, such as scallops and large clams, the valves are corrugated to give them extra mechanical strength. Most bivalves are not capable of active swimming and most are burrowing animals, using their muscular foot to excavate a burrow in soft sediments (some bore into corals and similar hard materials).