The top farm product produced in the U.S. in terms of its value is ________
Fill in the blank(s) with correct word
corn
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The two types of crust are continental and lithospheric. Indicate whether the statement is true or false
The elevation of the water table will rise when
A) recharge equals discharge. B) recharge is less than discharge. C) recharge is greater than discharge.
Evidence from proxies indicate eight major oscillations in global temperatures over the past 800,000 years, most likely the result of
A) rising and falling sea levels that greatly impact photosynthetic activity. B) variations in solar activity that produce different levels of radiation. C) Milankovitch cycles of periodic variations in Earth's orbits around the sun. D) lunar cycles in which the moon orbits at different distances from the Earth.
A community with hundreds of different types of primary producers, a few herbivores and only one carnivore, has
A. Little complexity B. Low productivity C. A great deal of complexity D. A great deal of productivity E. Little diversity