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Fossilized stromatolites
(a) formed around deep-sea vents.
(b) resemble structures formed by bacterial communities that are found today in some shallow marine bays.
(c) provide evidence that plants moved onto land in the company of fungi around 500 million years ago.
(d) contain the first undisputed fossils of eukaryotes.
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According to the big bang theory, after the "bang," the universe remained dark until about 300,000 yearsone billion yearsthree minutesthree billion years later, when neutral atoms began to form.
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Variety of living organisms; includes genetic, species, and ecological types.
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Fossilized stromatolites
(a) formed around deep-sea vents.
(b) resemble structures forme...
(a) formed around deep-sea vents.
(b) resemble structures forme...
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