Aerobic bacteria in the genus ________ are metabolically diverse soil-dwellers which also cause opportunistic disease in cystic fibrosis patients.
A. Burkholderia
B. Coxiella
C. Enterobacter
D. Prevotella
E. Hafnia
Answer: A
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What are some of the changing things in our current world that the author claims we are not well adapted to yet?
A. Computer screens B. Junk food C. Sterile environments D. 24 hour schedules E. None of the above (A-D) F. Some of the above (A-D)
48. If a person is treated with a single anti-HIV drug, they often end up with a resistant strain. How does this occur?
A. The HIV wants to avoid the drug, so it becomes resistant. B. The drug causes mutations in the HIV, making them resistant to the drug. C. All of the answer choices are correct. D. The drugs kill all sensitive viruses, leaving only the preexisting resistant viruses. E. The drugs weaken the immune system, making a patient more susceptible to infection with resistant strains of HIV.
A characteristic that sets the endocrine system apart from the nervous system as a communication system is that endocrine control tends to be faster than nervous control.
a. true b. false
The primary function of spongy mesophyll is:
a. photosynthesis. b. transpiration. c. to allow diffusion of gases. d. transport of substances. e. transport of water.