Match the following items with the correct phrases.
_______1. Some of these bacteria live in and near root nodules of plants called legumes, including alfalfa, clover, peas, soy beans, and peanuts.
_______2. Convert nitrogen in the air into ammonia in the soil by a process called nitrogen fixation.
_______3. Convert the nitrogen that is found in dead plants and animals to ammonia in the soil by a process called ammonification.
_______4. Convert nitrates in the soil to nitrogen in the air by a process called denitrification.
_______5. Convert ammonia in the soil to nitrites and nitrates by a process called nitrification.
a. decomposers and saprophytes
b. denitrifying bacteria
c. nitrifying bacteria
d. nitrogen-fixing bacteria
e. nitrogen-unfixing bacteria
1. d. nitrogen-fixing bacteria
2. d. nitrogen-fixing bacteria
3. a. decomposers and saprophytes
4. b. denitrifying bacteria
5. c. nitrifying bacteria
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Population growth is fastest in which stage of the
demographic model? a. preindustrial b. transitional c. industrial d. postindustrial e. pretransitional
Which class of fats is used to synthesize various vitamins and hormones?
a. fatty acids b. triglycerides c. phospholipids d. sterols e. waxes
The Ames test ____
a. measures UV exposure b. detects Salmonella levels c. found there is a cancer epidemic cause by synthetic chemicals d. found that most cancer-causing chemicals produce mutations e. measures the relationship between viral infections and cancer
Darker skin color is correlated with ____
a. the northern hemisphere b. inland regions c. coastal regions d. longitude e. the intensity of UV radiation