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Home Q & A Board Biology-Related Homework Help Biochemistry
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Hog95 Hog95
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12 years ago
Scientists know that the Earth’s early oceans around three billion years ago were very
rich in dissolved iron salts, including ferrous chloride (FeCl2). Many ferric compounds,
including ferric oxide (Fe2O3), are rather insoluble in water. Given these facts, what kind
of hard evidence would you look for to prove that oxygen entered the atmosphere about
two billion years ago, as shown in textbook Figure 2.27?
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bio_manbio_man
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12 years ago
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Hog95 Author
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#2
11 years ago
Thank you!
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