The land bridge called Beringia during the last glacial advance about 20,000 years ago allowed animals to be exchanged among which two zoogeographic realms?

A) Neotropic and Nearctic
B) Australian and New Zealand
C) Palearctic and Nearctic
D) Neotropic and Paleotropic


C) Palearctic and Nearctic

Environmental & Atmospheric Sciences

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What is the chemical formula for methane, a known greenhouse gas?

A. CH4 B. CO2 C. CaCO3 D. C6H1206

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Ozone is actually a form of the element hydrogen

Indicate whether the statement is true or false

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D climates are found in the high latitudes of the Southern Hemisphere

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

The principle of isostasy refers to:

a) the difference in the strength of the mantle versus the crust b) the relationship between regional elevations and thickness of crustthe relationship between regional elevations and thickness of crust c) how the outer core differs from the inner core d)how the upper mantle differs from the lower mantle

Environmental & Atmospheric Sciences