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OpenStudy (minecraftqueen):
Before there was any life on earth, which gas was absent from earth's ancient atmosphere? * nitrogen oxygen methane ammonia
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OpenStudy (minecraftqueen):
i think its oxyegn
OpenStudy (anonymous):
oxygen
OpenStudy (minecraftqueen):
can u help me with 2 more
OpenStudy (minecraftqueen):
@Missiey
OpenStudy (anonymous):
sure
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OpenStudy (minecraftqueen):
What orgranism has been found in the oldest fossils? * fish ferns cyanobacteria humans
OpenStudy (anonymous):
cyanobacteria
OpenStudy (gentorr):
c
OpenStudy (minecraftqueen):
Which cells contain a nucleus and membrane-bound organelles? * prokaryotic archaean cyanobacteria eukaryotic
OpenStudy (minecraftqueen):
i think d
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OpenStudy (anonymous):
correct its d
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