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What keeps atmospheric oxygen and carbon dioxide at stable levels?
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Which is the graph of the piecewise function f(x)? f(x) = image for option 1 image for option 2 image for option 3 image for option 4
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Are the layers of rock above and below the coal older or younger?
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When it is summer at the south pole, a. the northern hemisphere is tilted toward the sun. b. the southern hemisphere is tilted away from the sun. c. the northern hemisphere is tilted away from the sun. d. both the southern and northern hemispheres are tilted toward the sun.
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Biology, 23.06.2019 10:30
Which of the following best describes homeostasis? a.) the state of maintaining a stable internal environment despite changing external conditions b.) the state of maintaining a stable internal environment due to electrical impulses c.) the state of maintaining a stable internal environment due to chemical signals d.)the state of maintaining a stable internal environment when the external conditions are constant
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What keeps atmospheric oxygen and carbon dioxide at stable levels?...
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