Which of the following is a desirable general characteristic of antimicrobial drugs?

A. Bactericidal rather than bacteriostatic
B. Selective toxicity
C. Broad-spectrum of activity
D. All of the choices are correct.


Answer: D

Biology & Microbiology

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Which of the following would decrease mean arterial pressure?

A) increase in total peripheral resistance B) increase in arteriole diameter C) increase in heart rate D) increase in venous return E) increase in stroke volume

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Which of the structures in Figure 48-1 represents the nitrogenous waste urea?


a. 1
b. 2
c. 3
d. 4
e. 5

Biology & Microbiology

You find a unicellular organism that forms lobe-like pseudopodia. When you expose the cells to cAMP, they

aggregate into a slug like structure. Based on this information, you correctly conclude that this organism is known as: a. Chlamydomonas. b. Chaos carolinense. c. Entamoeba histolytica. d. Dictyostelium discoideum. e. Physarum polycephalum.

Biology & Microbiology

When parents, on average, have just the number of children required to replace themselves, the natural increase of their population is at replacement level fertility (RLF)

Indicate whether the statement is true or false

Biology & Microbiology