A virologist wants to observe the three-dimensional surface features of virus particles she is studying. Which of the following microscopes would be most useful for her observations?
A. differential interference contrast
B. atomic force
C. scanning electron
D. transmission electron
E. atomic force or scanning electron
Answer: E
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Which of the following is an example of cardiac output?
a. The hummingbird heart beats approximately 800 times per minute. b. During exercise, the heart rate in humans can double. c. The human heart pumps about 1500 gallons of blood per day. d. All of these are examples of cardiac output.
Briefly describe the coevolution of predators and prey. Does this concept apply to parasites and hosts?
What will be an ideal response?
A microarray of thousands of DNA sequences stamped onto a glass plate is a ____
a. Polysome b. DNA chip c. Plasmid d. Polygene e. DNA plate
You and your friend are on vacation at Yellowstone Park. The plaque in front of a sulfur hot spring reads: "This sulfur spring is 80°C, has a pH of 2, and contains large amounts of sulfur which is oxidized by Sulfolobus species of archaea." Your friend is excited. "Boy, if those microbes are that tough they should be easy to grow in the lab. I think I'll work with those for my summer project." What do you think?
A. The sulfur spring is pretty extreme, but after a few days the individual archaea should have adapted to lab culture conditions. B. The sulfur spring is pretty extreme, but after a few generations the species should have adapted to the lab culture conditions. C. You agree, and decide to partner with your friend to work on this organism as well. D. A species adapted to such extreme conditions would probably not be easy to culture in the very different conditions of a lab.