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PIT_PIT [208]
4 years ago
6

the presence of stromatolites in some very old rocks can help scientists determine the absolute age of those rocks back to about

Biology
1 answer:
Whitepunk [10]4 years ago
5 0
 is one of your choices 3.5 billion years 
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olchik [2.2K]
The answer would be D.

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What percentage of calories that you take in every day are consumed by your brain's activity?
Phantasy [73]

Answer:

20%

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3 years ago
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creativ13 [48]
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6 0
3 years ago
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