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Question 21 (1 point) Oxygen is essential for many f s of life, yet e.pdf

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Question 21 (1 point) Oxygen is essential for many f s of life, yet early Earth had very little oxygen in the atmosphere. Where did the increase in oogen come from? Ancestral plants O Ancient bacteria O Weathering of rocks O Breakdown of ozone O vaporization of water Save Solution Answer: 21). Ancient bacteria Some oxygen can be generated by photochemical reactions, but the process accounts for only a small percentage of the oxygen. The most of the oxygen is increased by the photosynthesis of single-celled bacteria. 22). none of these answers is true about all prokaryotes Some bacteria are phototrophs (cyanobacteria), some bacteria are heterotrophs. No bacteria contain membrane bound organelles. True bacteria come unded the domain, bacteria whereas the rest of the bacteria come under the domain, Archaea..

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Question 21 (1 point) Oxygen is essential for many f s of life, yet early Earth had very little oxygen in the atmosphere. Where did the increase in oogen come from? Ancestral plants O Ancient bacteria O Weathering of rocks O Breakdown of ozone O vaporization of water Save Solution Answer: 21). Ancient bacteria Some oxygen can be generated by photochemical reactions, but the process accounts for only a small percentage of the oxygen. The most of the oxygen is increased by the photosynthesis of single-celled bacteria. 22). none of these answers is true about all prokaryotes Some bacteria are phototrophs (cyanobacteria), some bacteria are heterotrophs. No bacteria contain membrane bound organelles. True bacteria come unded the domain, bacteria whereas the rest of the bacteria come under the domain, Archaea.

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  • 1. Question 21 (1 point) Oxygen is essential for many f s of life, yet early Earth had very little oxygen in the atmosphere. Where did the increase in oogen come from? Ancestral plants O Ancient bacteria O Weathering of rocks O Breakdown of ozone O vaporization of water Save Solution Answer: 21). Ancient bacteria Some oxygen can be generated by photochemical reactions, but the process accounts for only a small percentage of the oxygen. The most of the oxygen is increased by the photosynthesis of single-celled bacteria. 22). none of these answers is true about all prokaryotes Some bacteria are phototrophs (cyanobacteria), some bacteria are heterotrophs. No bacteria contain membrane bound organelles. True bacteria come unded the domain, bacteria whereas the rest of the bacteria come under the domain, Archaea.