Trickling filters may be used in place of activated sludge in secondary sewage treatment
Indicate whether this statement is TRUE or FALSE.
TRUE
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Electron microscopy has greater ________ than light microscopy, because the wavelengths of visible light are much larger than the wavelengths of electrons
A) contrast B) magnification C) resolution D) penetration
Traditional cancer treatments include
A) surgery, chemotherapy, and radiation. B) nutritional therapy and physical therapy. C) monoclonal antibodies and cytokines. D) gene therapy.
Why is the absence of atmospheric oxygen (O2) so important to the Oparin-Haldane hypothesis?
a. Oxygen is corrosive and thus would have degraded many of the metallic compounds on the surface, releasing toxic gasses into the new atmosphere. b. Oxygen is more reduced than hydrogen gas, methane, or ammonia. c. Oxygen would have supported microorganisms that help chemical decay proceed. d. Oxygen is able to reverse reactions by removing electrons and hydrogen from organic molecules, thus destroying the first organic compounds as quickly as they developed. e. Oxygen would have caused multiple explosions, converting chemical energy into heat energy and rendering that energy unavailable for driving the synthesis of organic molecules.
An organism that grows slowly in the cold but has an optimum growth temperature of 32°C is called a(n) ________.
A. thermophile B. facultative psychrophile C. thermoduric microbe D. extremophile E. psychrophile