A. human populations tend to increase more slowly than their ability to increase the food supply. B. agricultural production increases in a geometric fashion. C. people could use “moral restraint” to reduce the birth rate. D. famine war and pestilence are social problems that a population can overcome....
A. reliance on animal power as a source of energy B. the high levels of surplus produced by the agricultural sector C. the ease of migration to the city D. all of the above...
A. the genes used cannot spread into the wider environment B. they involve transplanting genes from one organism to another C. we can say with certainty that they are risk-free D. they have been accepted by consumers in all countries...
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