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.
The main muscle of a bivalve is called the adductor muscle, and is also used to hold the shell halves together. When the bivalve s adductor muscles relax, the ligament causes the valves to open. Most species are also equipped with locking teeth or sockets beneath the ligament to prevent lateral slippage.ther ancient bivalves appear to have a double set of gills. The second sets of gills actually arise from a folding of the single gill. This is the case in the Filibranchia and Eulamellibranchia, where the gills have also taken over the function of obtaining food.