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The Earth s history has had a significant effect on the characteristics of its organisms and biomes. How was the Carboniferous period different from the Devonian period? a. Forests and land plants evolved during the Carboniferous period. b. There were vertebrates in the Carboniferous period, but not in the Devonian period. c. There were an increased number of land-based organisms in the Carboniferous period. d. There were vertebrates with four legs in the Devonian period, but not in the ...
Weegy: The name "Carboniferous" reflects the most famous attribute of this geologic period: the massive swamps that cooked, over tens of millions of years, into today's vast reserves of coal. [ However, the Carboniferous period was also notable for the appearance of new terrestrial vertebrates, including the very first amphibians and lizards. The Carboniferous was the second-to-last period of the Paleozoic Era (542-250 million years ago), preceded by the Cambrian, Ordovician, Silurian and Devonian periods and succeeded by the Permian period. The global climate of the Carboniferous period was intimately linked with its geography. During the course of the preceding Devonian period, the northern supercontinent of Euramerica merged with the southern supercontinent of Gondwana, producing the enormous Pangea, which occupied much of the southern hemisphere during the Carboniferous. This had a pronounced effect on air and water circulation patterns, with the result that a large portion of southern Pangea wound up covered by glaciers, and there was a general global cooling trend (which, however, didn't have much effect on the coal swamps that covered Pangea's more temperate regions). Oxygen made up a much higher percentage of the earth's atmosphere than it does today, fueling the growth of terrestrial megafauna, including dog-sized insects. ] (More)
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Asked 10/20/2013 2:40:52 PM
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Air pollution in US National Parks is effecting the environment in what way(s)?
Weegy: Air pollution is among the most serious threats facing national parks. Dirty air can darken the horizon and ruin scenic views. It is also harmful to plants, fish, and other wildlife, and even affects the health of visitors and park staff. [ Most of the air pollution affecting national parks results from the burning of fossil fuels, especially by coal-fired power plants. ] (More)
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Asked 10/21/2013 2:42:19 PM
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Which of the following human activities would be expected to be the biggest contributor to air pollution?
Weegy: Can you provide us with the options? (More)
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Asked 10/26/2013 1:10:11 PM
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Harvesting timber (wood) from a forest does not harm _______. a. soil b. wildlife habitat c. animals d. none of the above
Weegy: Harvesting timber (wood) from a forest does not harm soil. (More)
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Updated 10/27/2013 10:09:06 AM
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Answer is d. none of the above
Harvesting timber (wood) from a forest MAY POTENTIALLY harm a. soil: b. wildlife habitat; and c. animals.
Added 10/27/2013 10:09:06 AM
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