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.
However, look at the single-celled organisms that reproduce asexually. Asexual reproduction is beneficial in many circumstances in that it can create individuals rapidly and in large quantities. For example, yeast can duplicate every hour under the proper conditions. For yeast, that means survival by sheer numbers. For us, it means we can make bread in a few hours.