Nonpoint sources of pollution
a. enter ecosystems from single identifiable sources
b. are more difficult to control than point sources
c. include smokestacks and automobile exhaust pipes
d. are cheaper and easier to identify than point sources
e. are always found in rural areas
B
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If the solubility of a compound is 30 grams per liter, how much solid is left undissolved if you mix 30 g of the compound in 0.33 L of solution?
A. 0 g B. 20 g C. 10 g D. 33 g E. 30 g
Coastal winds that shift from night to day illustrate
A. convection. B. conduction. C. radiation. D. all about equally
During the entire Paleozoic, the western margin of North America could be described as ____
A)tectonically active with the development of numerous mobile belts B)a passive margin with only localized mountain building events C)a passive margin with no evidence of orogeny D)an active margin with thick carbonate platforms E)a zone of active volcanism
As of 2014, more than 20,000 species have been placed on the Red List because
A) they are at high risk of extinction as determined by criteria similar to the criteria for designating endangered species in the United States. B) these species are considered the most invasive and ecologically disruptive species in their regions. C) according to the Aichi Biodiversity Targets, they will all become extinct by 2020. D) international legislation is underway to protect their habitats from further development.