12., Regarding global warming, most scientists (including those who have advised the United Nations through the Intergovernmental Panel on Climate Change) agree that if we continue to burn fossil fuels at an accelerating rate:, A., Climate changes will primarily hurt poor people in warm places, but the climate changes are primarily being caused by wealthier people in colder places.B., Climate changes will primarily hurt wealthy people in cold places.C., Climate changes will hurt everyone, equally.D., Climate changes will help everyone.E., Climate changes will primarily hurt poor people who live in warm places and who are the major contributors to climate change through cutting of tropical rain forests and other activities.Blizzards play havoc with airline travel, which hurts the economy in the mid- and high-latitude wealthier countries. If you have winter (so that warming reduces blizzards), air conditioners (so you can keep the economy humming when the weather is otherwise too hot for office work), and bulldozers (so you can build sea walls or haul things out of the way as the ocean rises), a little warming might even help your economy, although too much warming will be bad. If you are missing any of winter, air conditioning, or bulldozers, all warming is likely to be bad. Most of the world’s people are missing all three, and will be hurt by warming, but the warming is being caused primarily by people who have all three., Points Earned:, 1/1Correct Answer:, A Your Response:, A
, 13., Many plants are hard to get along with. Imagine crashing pell-mell through a thicket of devil’s club (pictured above), in coastal Alaska, to get away from a charging brown bear. The native people use devil’s club for medicinal purposes. We now know that: , A., Plant protection by thorns is supplemented by chemicals that are poisonous to many plant-eaters but always beneficial to humans, and that form the basis for all human medicines. B., Plant protection by thorns is supplemented by chemicals that are poisonous to many things that would eat the plants; those chemicals are sometimes harmful to humans (poison ivy, for example) but sometimes beneficial to humans, and have given us many of our medicines. C., Thorns, such as shown here, help protect plants, but plants also gain protection by making chemicals that are poisonous to many things that would eat the plants; those chemicals are always harmful to humans (poison ivy, for example). D., Devil’s club is a new development of the Pepsi Corporation, and is planted around Coke machines by midnight saboteurs E., The thorns shown here, and guard hairs and such, provide the primary protection for plants. Most plants have physical protections of some sort (hairs, thorns, hardened parts, bark, etc.), but almost all plants have chemical defenses. Those chemical defenses may kill us if we eat too much, but they may ki
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- Fall '08
- Global Warming, Correct Answer, Coal, Pennsylvania, plant material, Points Earned