Chemistry, 21.11.2019 19:31 yachtboy1917
Which of the following best describes a change in earth’s atmosphere made by early photosynthetic life?
a.
increased level of oxygen
b.
increased level of carbon dioxide
c.
decreased ability to support life
d.
decreased ability to transmit light
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Which of the following best describes a change in earth’s atmosphere made by early photosynthetic li...
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