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For life to flourish on Earth, several changes occurred that affected the atmosphere, such as _____.

1 answer:

8 0

Evolution of cyanobacteria that produce O2volcanic outgassing to create a thicker atmosphereformation of an ozone layer to block harmful radiationall of the above<span>only a and c

Are the options</span>

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m = mass of each block = 0.2 kg

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