The disinfectant of choice for municipal water supplies is ________.

A. ultraviolet light
B. either fluorine or chlorine
C. fluorine
D. chlorine


Answer: D

Biology & Microbiology

You might also like to view...

A cross in which a researcher investigates the patterns of inheritance of a single trait is called a ____

A. monohybrid cross B. dihybrid cross C. two-factor cross D. cross-fertilization E. self-fertilization

Biology & Microbiology

In the accompanying figure of Jones and Reithel's work with snapdragons, what is the most likely outcome if these plants were in a natural setting?

A) A 2% change is too small to be significant, so yellow and white flowers will remain in roughly equal percentages in future generations. B) Yellow and white flowers will oscillate in frequencies, depending on environmental conditions such as rainfall. C) Yellow flowers will continue to increase in frequency, as compared to white flowers, over time. D) Because the yellow trait is recessive, yellow flowers will ultimately take over the population.

Biology & Microbiology

During the process of photosynthesis, solar energy is converted to

A) chemical energy. B) nuclear energy. C) heat energy. D) mechanical energy. E) thermal energy.

Biology & Microbiology

Which of the following is essential in order to maintain serum pH within normal range?

A) Carbonic acid and bicarbonate ion must be present in equal quantities. B) All excess carbonic acid must be excreted by the kidneys. C) The concentration of bicarbonate must remain constant. D) The ratio of carbonic acid to bicarbonate must be 1:20.

Biology & Microbiology