How did the Cenozoic conditions of eastern and western North America differ?


The east was dominated by erosion, while in the west, tectonism yielded a number of basins that became the sites of sediment deposition.

Environmental & Atmospheric Sciences

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Which section of a stream is characterized by the absence of fish and found downstream from the release of oxygen-demanding wastes and heat?

A. clean zone B. decomposition zone C. septic zone D. recovery zone E. dead zone

Environmental & Atmospheric Sciences

Complex carbohydrates are a type of ____.

A. lipid B. chemical formula C. monomer D. protein E. organic polymer

Environmental & Atmospheric Sciences

A mirage that changes the apparent size of an object is called:

A) towering. B) magnification. C) looming. D) dispersion.

Environmental & Atmospheric Sciences

The Paleozoic Era began approximately ________ years ago.

A. 252 million B. 2.6 million C. 531 million D. 65 million E. 4.55 billion

Environmental & Atmospheric Sciences