What are the 2 types of Global Change?
a. Large-scale global change and small-scale global change
b. Long-tern global change and short-tern global change
c. Physical global change and chemical global change
d. Unidirectional global change and cyclic global change
Answer: d. Unidirectional global change and cyclic global change
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Lakes that fall between the two extremes of nutrient enrichment are called
a. Oligotrophic b. Mesotrophic c. Eutrophic d. Trophic e. Metatrophic
Explain why critics did not readily accept the Darwin-Wallace theory of natural selection. What will be an ideal response?
Properties of toxicants likely to build up in animals through bioaccumulation are ________
A) nitrogen and sulfur compounds B) non-biodegradable, lipid-soluble C) biodegradable, water soluble D) carcinogens and mutagens E) gases carried by pesticide drift
After the drought of the 1930's farmers in the Great Plains were encouraged to plant rows of trees across fields to decrease soil erosion. How would this reduce soil erosion?
a. The trees had no effect; they were just used to improve the land appearance after the great depression. b. The trees can serve as windbreaks to slow wind erosion. c. Tree roots would retard runoff and prevent erosion. d. The trees helped shade the ground, retaining moisture.