Which of the following phenomena produces magnification?
A. the wavelength of a radiation source
B. the refraction of radiation as it passes through a lens
C. the thickness of a microscopic specimen
D. the numerical aperture of a lens
E. the length of an objective lens
Answer: B
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The anaerobic organisms used in sewage treatment may produce the useful product(s)
A. oxygen. B. nitrogen. C. carbon monoxide. D. methane. E. nitrogen AND carbon monoxide.
An atom that is negatively charged because it has accepted an electron is a(n):
A. isotope. B. isomer. C. ion. D. monomer.
Obligate mutualisms: Lichens
What will be an ideal response?
The label on a container of margarine lists "hydrogenated vegetable oil" as the major ingredient. Hydrogenated vegetable oil _____
A) is solid at room temperature B) has more "kinks" in the fatty acid chains C) has fewer trans fatty acids D) is less likely to clog arteries