The principle that states specific intervals of sedimentary strata could be recognized over broad areas by the unique assemblages of fossils they contain is known as the ________.
A. law of inclusions
B. law of faunal assemblages
C. law of superposition
D. law of original horizontality
Answer: B
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The human population currently totals
A. 87 million. B. 2 billion. C. 4 billion. D. 7.1 billion. E. 10 billion.
Which is TRUE regarding the fourth stage of demographic transition?
A) Death rates reach zero. B) Birth rates are the lowest in this stage. C) Economic development suffers. D) Families grow larger, a trend that continues for a half century. E) Plagues and famines become common in countries that are not ready for the fourth stage.
How does the burning of fossil fuels affect the environment?
A) Greenhouse gases are released that raise global temperatures. B) Sulfur dioxide is produced, which contributes to acid rain. C) Particulates are released into the atmosphere, which collect on ice caps and glaciers to absorb more heat. D) Increased carbon dioxide in the atmosphere leads to ocean acidification. E) All of the above.
Progesterone, which is present in humans as a single stereoisomer, has six stereocenters. Human progesterone is one of how many possible stereoisomers for this structure?
A) 6 B) 32 C) 64 D) 128