What typically separates zoogeographic regions?
A. migration patterns
B. physical barriers
C. latitudinal zones
D. food regions
E. behavioral adaptations
B
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Where do the most intense summer monsoons occur?
A) Asia B) Africa C) South America D) Gulf of Mexico
Heat is mainly absorbed in the ''greenhouse effect" by which two gases?
a. oxygen and hydrogen b. water vapor and carbon dioxide c. ozone and nitrogen d. nitrogen and argon
After two half-lives, there is no longer any of the original radioactive material remaining.
a. true b. false
In a commensal relationship,
A. Two species live together and both suffer B. One species benefits while the other suffers C. Two species live together and both benefit D. Two species live together and neither benefits nor suffers E. One species benefits while the other neither suffers nor benefits