What is the usual size range of viruses?
A. 30 to 300 nanometers
B. 20 to 300 micrometers
C. 20 to 300 millimeters
D. 20 to 300 centimeters
Ans: A. 30 to 300 nanometers
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Mutated proto-oncogenes become cancer-causing genes called ________.
Fill in the blank(s) with the appropriate word(s).
Cholesterol, a membrane lipid in animals, has a chemical structure similar to
a. estradiol. b. phosphatidylinositol. c. thymine. d. triacylglycerol.
Culture-independent molecular techniques have found evidence for colonization of water distribution systems by ALL of the following opportunistic pathogens EXCEPT
a. Escherichia coli. b. Mycobacterium spp. c. Pseudomonas aeruginosa. d. Acanthamoeba.
With humans making up such a small percentage of life on Earth, which of the following represents the rationale behind spending a disproportionate amount of scientific research studying humans?
A. Humans are interested in learning how their own bodies function. B. Our role in the ecosystem needs to be understood in order to plan for our future. C. The more that is discovered about humans, the more likely it is that disease can be combatted. D. Humans are curious about their origins. E. All of the above are reasons for spending a disproportionate amount of scientific research studying humans.