Seawater with less than 3.5% is termed
A) brine. B) metahaline. C) freshwater. D) brackish.
D
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Discuss the publication of the world’s first geologic map. Who published it? What area did it
cover? What was the purpose of this map? What will be an ideal response?
Pesticide-resistant insects develop from the widespread use of insecticides because
A) pesticides cause mutations in the insects that make them resistant. B) pesticides increase the biotic potential of some insects. C) insects learn to avoid the places where insecticides have been applied. D) over many generations, the naturally resistant pests survive and increase in number.
________ has (have) been responsible for around 50% of the sea level rise over the last century.
A. A dip in the jet stream B. Extreme weather events C. Change in the Gulf Stream circulation D. Melting and loss of ice
The geographic grid line 180 degrees of longitude from the Prime Meridian is the ________
A) Tropic of Cancer B) 90th meridian C) 180th meridian D) 320th meridian E) Tropic of Capricorn