A neutral solution has a pH of ________
A) 5 B) 1 C) 7 D) 14
D
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Flushing toilets with water accounts for one-fourth of water use in the home.
Answer the following statement true (T) or false (F)
Blight fungus kills U.S. chestnut trees because the trees ________
A) have not matured long enough to survive B) release the fungus in the leaves that fall to the ground and the fungus is absorbed in the soil C) are hosts to the vectors of the fungus D) have not coevolved with the fungus E) release the fungus into the soil and it is drawn up in the roots
Which of the following is the primary limiting factor that controls the vegetative character of a biome?
a. light b. precipitation c. nutrients d. soil type e. predation
?Match the term with the correct description.
A. ?natural nutrient enrichment of a shallow lake, a coastal area at the mouth of a river, or a slow-moving stream B. ?human activities that increase the input of plant nutrients to a lake C. ?loss of oxygen in a section of a stream due to the breakdown of biodegradable wastes by bacteria D. ?massive volume of ocean water with a low dissolved oxygen content E. ?a lake low in nutrients with clear water