Which of the following are jawless fishes?
A. lampreys
B. sharks
C. tuna
D. salmon
E. skates
A. lampreys
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Which of the following statements is TRUE?
A) Lambda is a temperate phage that infects Escherichia coli. B) Lambda is a linear double-stranded DNA phage. C) Lambda is replicated by the rolling circle mechanism. D) Lambda is a temperate phage that replicates its double-stranded DNA genome with a rolling circle mechanism.
Blood cultures collected for the recovery of N. gonorrhoeae or N. meningitidis require:
a. no special methods. b. more than 0.025% sodium polyanethol sulfonate (SPS). c. transfer from Vacutainer tubes to culture broth within 1 hour of collection. d. less than 0.025% SPS.
A more or less circular ring of mushrooms appears in your yard, apparently overnight. The circle is several yards in diameter. The most likely explanation for this circle of mushrooms is that:
A) the mushrooms are all part of the same organism, with mycelia radiating out from the location of a germinated spore. B) a circle is nature's most perfect shape for asexual reproduction structures. C) the fungus produces a toxin in the center to prevent too many mushrooms from being produced. D) one mushroom in the circle reproduced sexually to make all the other mushrooms in the circle.
Which of the following is not a reason(s) that we see an increased rate of disease emergence?
A) climate change B) population crowding C) changes in sociocultural practices (such as injectable illicit drugs, widespread global travel, and increased food processing and handling) D) decreased water quality E) deforestation and urbanization