Many species have provided medicines and products demonstrating that biodiversity has ________ value and should therefore be preserved
A) ethical
B) entertainment
C) aesthetic
D) economic
E) religious
D
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Compare and contrast valley and continental glaciers
If the Earth had no atmosphere,
A) less of the sun's energy would strike the Earth. B) all regions of the Earth would be considerably warmer. C) the Earth would experience much larger and more severe storms. D) the biogeochemical cycles and climate on Earth would be much different.
How does the Gulf Stream affect temperatures in North America and Europe?
Which of the following is CORRECT regarding the geologic time scale?
A) We live in the Tertiary period. B) Over 87 percent of Earth's history has elapsed during the more recent Cenozoic, Mesozoic, and Paleozoic eras. C) The bulk of Earth's history has occurred during the Precambrian eon. D) The Jurassic period occurred during the Paleozoic era.