Microbes known as transient microbiota are
A. microorganisms that remain with the person throughout life.
B. microorganisms that may cause a disease under certain circumstances.
C. organisms that remain in the body for a short time.
D. unsuccessful microbial invaders because of the presence of preexisting microbes.
E. sources of microbial contamination.
Answer: C
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A more recently developed cancer treatment is
A) stimulating telomerase activity. B) stimulating cells to return to a stem-like state of specialization. C) inhibiting kinases based on genetic information. D) replacing the nuclei in cancer cells.
The form of nitrogen most likely to be absorbed from the soil by plants is
A. nitrogenous wastes. B. nucleic acids. C. nitrogen gas. D. nitrous oxide gas. E. nitrite/nitrate ions.
A sugar or other molecule in which radioisotopes have been substituted for some atoms is a(n)
a. enzyme. b. reactant. c. tracer. d. subatomic particle. e. quark.
What is the most ancient group of plants alive today?
a. horsetail b. club moss c. hornworts d. liverworts e. gymnosperms