What is the difference between 'bacteremia' and 'septicemia?'
A. Bacteremia is an infection with bacteria. Septicemia is an infection with Septic protozoans.
B. Bacteremia is the presence of living, multiplying bacteria in the bloodstream. Septicemia is the presence of endotoxins, but not necessarily of living microbial agents.
C. Septicemia is the presence of living, multiplying bacteria in the bloodstream. Bacteremia is the presence of endotoxins, but not necessarily of living microbial agents.
D. There is no difference-both terms denote the presence of living bacterial cells in the bloodstream.
B
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The concept of a species was proposed by
A. Charles Darwin. B. John Ray. C. Carolus Linneaus. D. Erasmus Darwin. E. George Cuvier.
Which of the following is not a type of natural selection?
A. disruptive selection B. directional selection C. artificial selection D. All of the answer choices are correct. E. stabilizing selection
Chemicals that play the dominant role in protecting plants from being eaten by herbivores or predators are called
A. amino acids. B. secondary compounds. C. poisons. D. primary compounds. E. oils.
A population of mountain goats are split because of the formation of a glacier. After 500 years the glacier melts and the two goat populations are free to move between the two areas. Under what conditions might a hybrid zone occur?
A. Post-zygotic isolating mechanisms have arisen. B. Pre-zygotic isolating mechanisms have arisen. C. Gene flow between the two populations does not occur. D. Both pre- and post-zygotic isolating mechanisms have arisen. E. Reproductive isolation is incomplete.