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Biology, 22.06.2019 13:00
This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient
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Biology, 22.06.2019 13:00
Which spheres are involved when sedimentary rocks formed from parts of seashells at the bottom of the ocean? a.) biosphere, atmosphere, geosphereb.) geosphere, hydrosphere, biosphere c.) geosphere, exosphere, hydrosphered.) hydrosphere, biosphere, atmosphere
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Biology, 22.06.2019 15:30
Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit
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Biology, 22.06.2019 19:00
What is the next step in muscle contraction after the actin changes shape
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