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.
Sexual reproduction involves the combination of genetic material between a male and a female of the species. Consequently, each generation is different from the previous one. This genetic variation is advantageous in that it allows the species to adapt more quickly to changing conditions in the environment.