When microbial control methods are used, microbes are destroyed at a constant rate; there is no instantaneous death of all the microbes present. that microbial death rate is influenced by all of the following factors except
a. the number of microbes
b. the microbial characteristics
c. the time of exposure
d. toxins produced by the microbe

Toxins produced by the microbe.

Explanation:

Pasteurization is a method used to kill the microbes by high temperature.Specific antimicrobial drugs are used to kill the microbes if the microbe is pathogen in nature.

The death rate of microbes depend on the type of microbes, its characteristics and the time to which it has been exposed. The toxins produced by the microbes will affect its rate of infection but doesnot have any effect on the death rate.

Thus, the correct answer is option (d).

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.