To visualize the structure of DNA, which has a width of 10 nm, which microscope would be best?
a. fluorescence microscope
b. light microscope
c. staining microscope
d. polarized microscope
e. electron microscope
ANSWER: e
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Which of the following would be considered a sign of a disease?
A. Headache B. Pain C. Nausea D. Fever of 39?C
In humans, blood cells are produced in the
a. bone marrow. b. heart. c. kidneys. d. liver. e. lymph nodes.
Which type of learning occurs during a genetically determined time period, early in life?
a. instinct b. imprinting c. conditioned learning d. habituation e. imitative learning
The theory of global warming suggests that a trend toward warmer temperatures on Earth will cause glaciers to lose mass. A major consequence of glacial melting is
A. flooding coastal regions B. destruction of fossil records C. increased saltiness of the ocean D. increase in atmospheric carbon dioxide