The majority of photosynthesis in a lake takes place in the
a. profundal zone
b. limnetic zone
c. phototropic zone
d. littoral zone
e. benthic zone
B
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Rank the following compounds by solubility in acidic water, from most soluble to least. 1 ) CH3CH2OH 2 ) CH3OCH3 3 ) CH3CH2NH2
A) 1, 3, 2 B) 1, 2, 3 C) 3, 2, 1 D) 3, 1, 2 E) 2, 1, 3
Between 1960 and 2009, floods in the United States resulted in an average of ________ deaths per year.
A. 1,450 B. 1.4 C. 135 D. 14 E. 145,000
Symbiotic archaea that live inside tubeworms can use two different methods to metabolize ________ and can switch back and forth to accommodate fast-changing environmental conditions
A) arsenic B) cadmium C) carbon dioxide D) hydrogen sulfide E) sulfuric acid
Compressions and rarefactions of a longitudinal wave travel in
A. opposite directions. B. the same direction. C. both of these D. none of the above