Biology, 26.10.2019 23:43 nikkiebartels
According to scientific evidence, earth’s earliest atmosphere lacked oxygen. over time, oxygen was added to the atmosphere.
which statements explain how this change occurred and how it affected life on earth?
choose all answers that are correct.
a.
adding oxygen to earth's atmosphere allowed for the development of prokaryotic organisms, which need oxygen to carry out many of their life processes.
b.
adding oxygen to earth's atmosphere allowed for the development of eukaryotic organisms, which need oxygen to carry out many of their life processes.
c.
oxygen is needed to carry out photosynthesis. when cyanobacteria evolved, they began to carry out photosynthesis.
d.
oxygen is a product of photosynthesis. when cyanobacteria evolved, they began to carry out photosynthe
Answers: 2
Biology, 22.06.2019 03:00
Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils
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Biology, 22.06.2019 22:00
Compare the two theories regarding the evolution of dinosaurs and then consider the cladogram above. although the two theories differ on the evolutionary path of dinosaurs, they agree that
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Biology, 23.06.2019 00:30
Which of the following is not a symptom of desertification?
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According to scientific evidence, earth’s earliest atmosphere lacked oxygen. over time, oxygen was a...
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