What is the distinctive type of agriculture practiced in the population concentrations of East and South Asia, and how does this relate to concerns over the world's growing population and environmental problems?
What will be an ideal response?
Answer: Varies, beyond noting that intensive subsistence is the main type.
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The reintroduction of wolves into the Yellowstone ecosystem has been considered a success because
A. the wolves are thriving. B. local ranchers fear that wolves will attach cattle. C. ecotourism has decreased. D. biodiversity of the ecosystem has been re-established and sustained. E. global warming has ceased.
Asia and the North American continent have been connected by a land bridge at various times during the past. When was the Bering land bridge most recently exposed? Did this coincide with a warm or cool climatic period?
What will be an ideal response?
What do the continental polar (cP) and continental arctic (cA) air masses have in common?
A. They both bring strong thunderstorms. B. They both form in summer only. C. They both originate over polar oceans. D. They both tend to be dry.
Which of the following functional groups does not contain a carbonyl group?
A) ester B) alcohol C) aldehyde D) ketone