Which of the following cytokines act as a signal between leukocytes?
A) growth factors
B) interferons
C) interleukins
D) tumor necrosis factors
E) chemokines
C
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The several hundred species of picture-winged fruit flies of the Hawaiian Islands are genetically very similar, yet they all differ markedly from their ancestral population in Asia. This is probably an example of _____
A. gene flow. B. sexual selection. C. directional selection. D. founder effect. E. disruptive selection.
The most common energy-carrying molecule in the cell is
a. AMP. b. ADP. c. ATP. d. adenine. e. DNA.
All of the following are appropriate strategies for overcoming drug resistance in bacteria except ________.
A. prudent use of antibiotics when treating viral infections B. heightened infection control in health care facilities C. decreasing the use of antibiotics in agriculture D. patient compliance with dosage instructions when taking antibiotics
NADH dehydrogenase pumps 4 H+ across the membrane
What will be an ideal response?