The high concentration of iridium at the Cretaceous Tertiary boundary may be attributable to
A) a worldwide rise in sea level.
B) meteorite bombardment.
C) an out flux of iridium from Earth's interior.
D) none of the above
B
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On a per capita basis, how many resources does the U.S. consume compared to the world's poorest countries?
A. 100 times B. 10 times C. 30 times D. 1000 times
If the temperature of a gas increases, the ________ of the gas decreases
A) pressure B) number of moles C) volume D) None of these is correct.
Which of the following is NOT TRUE regarding the fourth stage of demographic transition?
A) This is the early industrial stage Europe, Japan, and North America are in this stage. B) Europe, Japan, and North America are in this stage. C) Deaths from infectious diseases are generally low. D) Birth rates continue to fall. E) Some countries in this stage might experience population declines.
Taxonomy is a system of classification of life based on the similarity of how organisms (species) look, and Ecology classifies life based on the similarity of where they are found.
a. true b. false