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volcanic outgasing
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How did oxygen become a part of earth's atmosphere and what did this increase in oxygen levels allow?
The majority of oxygen in the atmosphere come from photosynthesis. Aquatic Cyanobacteria (blue green algae) were the first known organisms to use photosynthesis, before there were land plants. The by product of photosynthesis is oxygen. This increase in oxygen eventually allowed organisms to use respiration as a method of energy production. Thus it allowed for land animals.
How did the evolution of photosynthetic prokaryotes affect the level of oxygen in the atmosphere?
Photosynthesizing prokaryotes affected the ancient atmosphere by adding oxygen. In ancient times the oxygen level was .42%, compared to the 21% oxygen level now. Photosynthesizing prokaryotes have made the world livable today.
What was earth's first atmosphere was mostly a mixture of?
Nitrogen and oxygen.
What is inferred to be the main source of the free oxygen that first entered earth's atmosphere?
oxygen producing organisms
Describe the significance of cyanobacteria in the formation of earth's atmosphere?
cyanobacteria also called blue-green algae is thought to be one of the first ever photosynthetic organism...prior to the evolution of photosynthetic organisms theoxygen percentage of the atmosphere was 0% and as we all know without oxygen (O2), ozone(O3) cannot form, and without ozone there can be no atmosphere. Photosynthetic organisms allowed for the formation of oxygen and brought oxygen levels to the percentage it is today (20% a significant increase from 0%) as a result ozone was able to form and ultimately the atmosphere emerged.
Which came first anaerobic or aerobic?
Anaerobic came first, because there was no oxygen in the Earth's original atmosphere.
Why is oxygen content tested first?
because most combustible gas meters are oxygen dependent and will not provide reliable readings in an oxygen deficient atmosphere .. balls
When performing Atmospheric Hazard Tests why is oxygen content tested first?
because most combustible gas meters are oxygen dependent and will not provide reliable readings in an oxygen deficient atmosphere
How did oxygen become a part of earth's atmosphere and what did this increase in oxygen levels allow?
The majority of oxygen in the atmosphere come from photosynthesis. Aquatic Cyanobacteria (blue green algae) were the first known organisms to use photosynthesis, before there were land plants. The by product of photosynthesis is oxygen. This increase in oxygen eventually allowed organisms to use respiration as a method of energy production. Thus it allowed for land animals.
Why did anaerobic respiration developed first?
Because aerobic respiration wouldn't have worked very well when there was no oxygen to speak of in the atmosphere.
How did the evolution of photosynthetic prokaryotes affect the level of oxygen in the atmosphere?
Photosynthesizing prokaryotes affected the ancient atmosphere by adding oxygen. In ancient times the oxygen level was .42%, compared to the 21% oxygen level now. Photosynthesizing prokaryotes have made the world livable today.
What was earth's first atmosphere was mostly a mixture of?
Nitrogen and oxygen.
What came first oxygen or life?
Life came first. The oxygen in Earth's atmosphere is a product of living organisms carrying out photosynthesis.
What is inferred to be the main source of the free oxygen that first entered earth's atmosphere?
oxygen producing organisms
What changed your formerly poisonous atmosphere into an oxygen rich atmosphere?
well, the first ice age is when blocks of ice and rocks release oxygen which helps us breathe
Describe the significance of cyanobacteria in the formation of earth's atmosphere?
cyanobacteria also called blue-green algae is thought to be one of the first ever photosynthetic organism...prior to the evolution of photosynthetic organisms theoxygen percentage of the atmosphere was 0% and as we all know without oxygen (O2), ozone(O3) cannot form, and without ozone there can be no atmosphere. Photosynthetic organisms allowed for the formation of oxygen and brought oxygen levels to the percentage it is today (20% a significant increase from 0%) as a result ozone was able to form and ultimately the atmosphere emerged.
Which of these statements is true about the oxygen revolution?
Cyanobacteria were the first organisms to produce oxygen in water, which then escaped into the atmosphere.
