Worldwide in 2015, there were ____ megacities, cities with more than 10 million inhabitants.
A. 2
B. 10
C. 30
D. 82
E. 150
Answer: C
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Which would you expect to be more viscous, a polymer made of long molecular strands or one made of short molecular strands? Why?
A. short molecular strands because of a greater density B. long molecular strands because of a greater molecular mass C. long molecular strands because they tend to tangle among themselves D. short molecular strands because their ends are typically polar
The Library of Alexandria was an important gathering place for intellectuals and a warehouse for written knowledge relating to trade, natural wonders, artistic achievements, and other items of interest to seafarers
Indicate whether the statement is true or false
Judge the following sentence according to the criteria given below: It is advantageous for fishers to choose a population that feeds as close to the primary producing population as possible BECAUSE energy transfer between trophic levels is
inefficient. A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
Milankovitch cycles are caused by
A. desertification. B. continental drift. C. melting of ice sheets. D. variations in earth's tilt on its axis and in its orbit.