Which of the following statements is true about buffer solutions?
A) They maintain a constant pH when bases are added to them but not when acids are added to them.
B) They maintain a constant pH when acids are added to them but not when bases are added to them.
C) They fluctuate in pH when either acids or bases are added to them.
D) They maintain a relatively constant pH when either acids or bases are added to them.
D
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The responsible management (use and conservation) of the earth's resources indefinitely is called ________.
A. the maximum sustainable yield B. landscape ecology C. sustainable development D. carrying capacity
In the lungs, which of the following would be classified as elastic work?
a. air flow resistance b. viscous resistance c. alveoli expansion d. intercostal contraction
Which important discovery in the early 1900s enhanced food production, thus increasing human population growth?
a. cultivation of rice b. cultivation of wheat c. the wheel d. synthetic fertilizer e. penicillin
Technique of using plasmid DNA to insert another species DNA into a bacterium or plant is called ________ transfer
Fill in the blank(s) with correct word