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TIME REMAINING
01:59:49
A scientist is examining the role of an element found in...
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TIME REMAINING
01:59:49
A scientist is examining the role of an element found in fats and carbohydrates of living things. This element makes up 65% of
human body mass.
Which statement describes the element he is studying?
He is studying oxygen, which can also be found in proteins.
He is studying oxygen, which is the most abundant element in the atmosphere.
He is studying nitrogen, which can also be found in proteins.
He is studying nitrogen, which is the most abundant element in the atmosphere.
Answers: 2
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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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