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Home Q & A Board Science-Related Homework Help Physics Astronomy
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083055 083055
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5 years ago
What evidence suggests that life was common on Earth within a billion years of its formation?
A) Life must have formed early in order to produce the variety of lifeforms seen today.
B) rocks older than 3.85 billion years with the carbon-12 to carbon-13 ratio typical of living organisms
C) 3.5 billion year old rock structures formed by microbes called stromatolites
D) A and C
E) B and C
Textbook 
The Essential Cosmic Perspective

The Essential Cosmic Perspective


Edition: 7th
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nmstarf4nmstarf4
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5 years ago
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083055 Author
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5 years ago
Smart ... Thanks!
MAry1395
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Yesterday
Just got PERFECT on my quiz
nadiia
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2 hours ago
Thanks
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