One liter of a solution of pH 2 has how many more hydrogen ions (H+) than 1 liter of a solution of pH 6?
A) 4 times more
B) 40,000 times more
C) 10,000 times more
D) 100,000 times more
C
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Match the following items with the correct phrases.
_______1. In the nitrogen cycle, bacteria called ____________________ convert atmospheric nitrogen gas into ammonia in the soil. _______2. ____________________ live in the root nodules of legumes such as alfalfa and clover. _______3. ____________________ are capable of converting the nitrogen within a dead plant or animal into ammonia in the soil. _______4. In the nitrogen cycle, soil organisms called ____________________ convert ammonia into nitrites, and nitrites into nitrates. _______5. In the nitrogen cycle, soil organisms called ____________________ convert the nitrogen in nitrates to nitrogen gas in the atmosphere. a. cyanobacteria b. denitrifying bacteria c. nitrifying bacteria d. nitrogen-fixing bacteria e. saprophytes
An irregular cluster of spherical bacterial cells is termed ________.
A. staphylobacillus B. streptococcus C. staphylococcus D. staphylospirillum E. streptobacillus
Which of the following is a eudicot?
a. corn b. lily c. dandelion d. orchid e. palms
Which of the following statement is not TRUE
A. during aerobic respiration most of the energy is derived from the electron transport system B. complete oxidation of glucose involves the formation of CO2 and H2O C. all of the above are TRUE statements D. fermentation yields less energy than anaerobic respiration E. most of the energy in fermentation is left in the end products