The shell of a bivalve is composed of calcium carbonate, and consists of two, usually similar, parts called valves. These are joined together along one edge (the hinge line) by a flexible ligament that, usually in conjunction with interlocking teeth on each of the valves, forms the hinge.rachiopods are shelled marine organisms that superficially resembled bivalves in that they are of similar size and have a hinged shell in two parts. However, brachiopods evolved from a very different ancestral line, and the resemblance to bivalves only arose because of a similar lifestyle.
Specialty doctors. If youâre working as a specialty doctor youâll earn a basic salary of Â£37,923 to Â£70,718. Consultants. As a consultant you'll earn a basic salary of Â£76,761 to Â£103,490 per year, depending on the length of your service.
Radiologists are the physicians most likely to have suffered a pay cut in the past year, with 42 percent reporting a decline in salary. However, they're also among the best-paid doctors, earning an average of $349,000.More than half would both choose to be doctors again and choose the same specialty. The doctors who work the longest hours are cardiologists, who report being on the job 60 hours per week.he average cardiologist earns $357,000 annually, though 39 percent have seen a cut in pay in the past year. Those least likely to have suffered a pay cut are emergency doctors, who earn an average of $270,000 and work an average of 46 hours per week.