The development of agriculture during the Neolithic Revolution made food
A) less abundant and less reliable.
B) more expensive and difficult to acquire.
C) less of a limiting factor on population growth.
D) less nutritious.
C
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It is predicted by demographers that how many people will live in the North American Region by the year 2050?
A) 423 million B) 270 million C) 323.9 million D) 41 million E) 464 million
Which of the following sequences gives the order of weather conditions you would likely experience in winter as you travel toward a warm front?
A. rain, snow, sleet, freezing rain B. snow, sleet, freezing rain, rain C. snow, freezing rain, hail, sleet D. freezing rain, snow, sleet, rain
What two main factors contribute to the global rise in sea level?
a) carbon dioxide and excess rainfall b) thermal expansion of ocean water and increased amount of ocean water from melting ice c) thermal expansion in trenches and ridges d) thermal expansion and carbon dioxide level e) all of the above
In a controlled experiment, ________
A) the researcher has several hypotheses, one of which will be proven correct B) you need only a single experimental organism which is tested again and again C) the researcher controls for the effects of all variables except one D) the researcher controls for the effects of only one variable E) the researcher knows the outcome before beginning the experiment