Ice cores record both the record of past temperatures, and also the causes of climate change
a. true
b. false
a
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The Roadless Controversy centers on
A) the introduction of invasive species into ecosystems along roadways. B) the spread of solid wastes and pollutants into natural areas from roads. C) restricting logging roads to halt timber harvesting and access by off-road vehicles. D) preventing court challenges to the legislation by intimidating tourists and hunters.
Climate is the central predictor of location in Von Thunen's model of agricultural land use
Indicate whether the statement is true or false
What is the relationship between stream gradient and average stream velocity?
A. Both stream gradient and velocity increase down stream. B. Both stream gradient and velocity decrease down stream. C. Stream gradient decreases while stream velocity increases down stream. D. Stream gradient increases while stream velocity decreases down stream.
What makes an exotic species become and invasive species?
A. When individuals begins to colonize new areas and out-compete native species. B. When they become annoying to people. C. When individuals stop being only ornamental but are used for other purposes also. D. All exotic species are also invasive.