The dark reactions of photosynthesis consume which of the following?
A) carbon dioxide
B) water
C) both a and b
D) neither a nor b
A
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For the purpose of gathering comparable data, the United Nations has imposed a precise definition of the meaning of urban upon the world's states
Indicate whether this statement is true or false.
Why is the solution to pollution not always dilution?
A. Some pollutants cannot be dissolved in any solvent. B. Water itself is a pollutant. C. Liquid pollutants cannot be dissolved in water. D. Some pollutants are toxic at such low concentrations that they cannot be practically diluted.
Cloud seeding using silver iodide works well in warm clouds composed entirely of water
droplets. Indicate whether the statement is true or false.
Arroyo gullies _____
a. are rectangular b. are triangular c. are V-shaped d. are U-shaped