coagulase. a bacterial enzyme that reacts with a cofactor found in blood plasma to catalyze the formation of fibrin from fibrinogen. It is produced by most of the virulent strains of staphylococci, and by Yersinia pestis.nzymatic conversion of fibrinogen in rabbit plasma to fibrin is used as a means of identifying pathogenic species of staphylococci. The test may be carried out rapidly on a slide or in several hours or overnight in a tube. Most coagulase-positive staphyloccoci are pathogenic; coagulase-negative ones commonly are not.
Asexual reproduction is an advantage in a stable environment. This is because it produces offspring genetically identical to the parent which is already well adapted and suited to the environment.
Reproduction, Asexual and Sexual. Organisms must reproduce and, in the context of evolution, must choose among different methods to do so. There are two major strategies for reproduction â sexual and asexual. Each tactic has its own advantages and disadvantages, and each is appropriate for certain situations. Vertebrates, such as humans, are almost exclusively sexual in their reproduction, many simpler animals are asexual.