From a human time perspective, mass extinctions ____
a. are rapid
b. are gradual
c. are immediately recognizable
d. involve a complete wipeout of all living organisms
e. only occurred in marine environments
b
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In addition to glaciers melting and the oceans acidifying, what other indicators are there of climate change?
A. Birds in the northern hemisphere have expanded their ranges northward. B. Birds in the southern hemisphere have expanded their ranges northward. C. Plants have expanded their range down mountain slopes. D. Bees have expanded their range in the direction of the equator.
Organisms that live in the marine ecosystem above the seafloor are called ____________________
Fill in the blank(s) with correct word
Europeans generate more CO2 emissions than do Americans
Indicate whether the statement is true or false
Solar radiation arriving at Earth's atmosphere and surface is called
A) solar constant. B) solar wind. C) auroras. D) thermosphere. E) insolation.