What does the first of Koch's postulates state?
a. The disease-causing organism must always be present in animals suffering from the disease but not in healthy animals.
b. The isolated organism must cause the disease when inoculated into healthy, susceptible animals.
c. The organism must be cultivated in a pure culture away from the animal body.
d. The organism must be isolated from the newly infected animals and cultured again in the laboratory, after which it should be seen to be the same as the original organism.
Answer: A
You might also like to view...
During meiosis II in sperm development
A) primary spermatocytes divide meiotically to form diploid secondary spermatocytes. B) secondary spermatocytes divide meiotically to form haploid spermatids. C) spermatids divide meiotically to form haploid spermatozoa. D) sperm and oocyte meet and merge.
Explain how a telomerase inhibitor might be an effective cancer treatment. What will be an ideal response?
Since mice are over _____________________% genetically similar to humans, they are appropriate models for
studying human conditions Fill in the blank(s) with the appropriate word(s).
For bacteria to continue growing rapidly when they shift from an aerobic environment to an anaerobic environment, they must
A) produce more ATP per molecule of glucose during glycolysis. B) increase the rate of glycolysis. C) increase the rate of glucose production. D) produce ATP using NADH. E) increase the rate of the Krebs cycle.