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What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen
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Why are scientists concerned about the depletion of the ozone levels in the stratosphere?
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Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?
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Biology, 22.06.2019 06:10
Drag each tile to the correct location. match each trait that an organism displays to a reproductive strategy.
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1) What changed with the cystic fibrosis mutation compared to the normal DNA? Please help me I need...
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