Which of the following countries does NOT face significant water supply challenges?
a. United States
b. Iraq
c. China
d. Mexico
e. None, all of these countries face water supply challenges
Ans: e. None, all of these countries face water supply challenges
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A base is a chemical that
A. accepts a hydroxide ion B. can be used to clean drains C. has a bitter taste D. donates a hydroxide ion E. accepts a hydrogen ion
Which of the following rocks is most likely to be formed from compacted plant remains?
a. coal b. limestone c. rock salt d. marble e. granite
What is included in a quantitative analysis of plankton?
A) An estimation of plankton in a volume of water B) An estimation of salt concentration in the water C) The behavior of plankton D) The amount of sunlight used by plankton
Which of the following is not true of nitrogen?
A) the atmosphere contains 78.084 percent nitrogen by volume B) Nitrogen is very important to organisms C) Atmospheric nitrogen is accessible directly to most organisms D) The key link in the nitrogen cycle is bacterial action