Secondary disinfection of drinking water is necessary to
A) maintain sufficient residual in the water distribution system to inhibit microbial growth.
B) prevent the formation of biofilms on pipes in the water distribution system.
C) neutralize taste- and odor-producing organic compounds.
D) kill Cryptosporidium and other resistant pathogens.
Answer: A
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A. presence of parasites in different areas B. amount of sunlight in different areas C. the altitude in different areas D. natural selection
Which of the following molecules is not a carrier of electrons in the electron transport system (ETS)?
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A) Golgi body. B) endosomes. C) lysosomes. D) peroxisomes. E) Neither C nor D are part of the endomembrane system.
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a. Liver b. Skin c. Kidneys d. Brain e. Nervous system