How did cyanobacteria affect earth's early atmosphere?
a.
they replaced oxygen with carbo...
Biology, 02.01.2020 13:31 griseldaguerree
How did cyanobacteria affect earth's early atmosphere?
a.
they replaced oxygen with carbon dioxide in the atmosphere.
b.
they eliminated the harmful ultraviolet rays of the sun.
c.
they replaced carbon dioxide with oxygen in the atmosphere.
d.
they absorbed ozone molecules from the atmosphere.
Answers: 1
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Acuvu time remaining 51: 04 there are two different alleles for flower color, p and p. the image shows a purple sweet pea that is labeled with its two alleles for petal color photo by christine matthews pp which is the genotype of the sweet pea? save and exit nex subs mark this and retum
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