In 2025, 7 of the 10 biggest cities in the world will be in
A) Asia.
B) Africa.
C) North America.
D) South America.
E) Europe.
Answer: A
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For natural selection to occur, an adaptive trait ____.
A. must be physical B. must be physiological C. must be psychological D. must be heritable E. cannot be heritable
What characterizes the third stage (industrial) of the demographic transition model? a. Birth rates remained high, but death rates dropped sharply due to medical and other innovations of the Industrial Revolution b. Birth rates begin to fall as affluence spread
c. Low birth rates and low death rates result in low population growth. d. Birth and death rates remain high. e. Population growth declines as birth rates are low and death rates are high.
In which of the following ways is the study of tree rings, speleothems, and corals similar?
A) Each have growth bands, yielding evidence of the conditions under which they formed and grew. B) The fossilized form of each is used for understanding past climatic conditions. C) The chronology each can provide only dates back to a maximum of 5,000 years and are, therefore, only useful for relatively recent climatic trends. D) All are composed of organic materials and are therefore good candidates for radiocarbon dating.
The world's population increases by about ________ people per year.
A. 80 million B. 8 million C. 800,000 D. 800 million