Physics, 30.08.2019 20:40 obryonshaniya10
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.
oxygen is needed to carry out photosynthesis. when cyanobacteria evolved, they began to carry out photosynthesis.
b.
adding oxygen to earth's atmosphere allowed for the development of prokaryotic organisms, which need oxygen to carry out many of their life processes.
c.
adding oxygen to earth's atmosphere allowed for the development of eukaryotic organisms, which need oxygen to carry out many of their life processes.
d.
oxygen is a product of photosynthesis. when cyanobacteria evolved, they began to carry out photosynthesis.
Answers: 1
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In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final
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According to scientific evidence, earth’s earliest atmosphere lacked oxygen. over time, oxygen was a...
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