Evaluate which of the following statements about the great oxygenation event are true. Cyanobacteria in the oceans produced a large amount of oxygen as the product of a chemical reactionThe proportion of carbon dioxide in the atmosphere increasedCyanobacteria in the oceans used up most of the oxygen in the atmosphere for photosynthesisBefore the event, no organisms were capable of photosynthesisTotal available marks: 5
Question
Evaluate which of the following statements about the great oxygenation event are true. Cyanobacteria in the oceans produced a large amount of oxygen as the product of a chemical reactionThe proportion of carbon dioxide in the atmosphere increasedCyanobacteria in the oceans used up most of the oxygen in the atmosphere for photosynthesisBefore the event, no organisms were capable of photosynthesisTotal available marks: 5
Solution
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True: Cyanobacteria in the oceans produced a large amount of oxygen as the product of a chemical reaction. This is true because cyanobacteria are known to perform photosynthesis, which produces oxygen as a byproduct.
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False: The proportion of carbon dioxide in the atmosphere increased. This is false because during the Great Oxygenation Event, the level of carbon dioxide actually decreased due to the photosynthesis performed by cyanobacteria, which consumes carbon dioxide.
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False: Cyanobacteria in the oceans used up most of the oxygen in the atmosphere for photosynthesis. This is false because photosynthesis produces oxygen, it does not consume it.
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False: Before the event, no organisms were capable of photosynthesis. This is false because cyanobacteria, which were present before the Great Oxygenation Event, are capable of photosynthesis.
So, the only true statement is the first one.
Similar Questions
Evaluate which of the following statements about the great oxygenation event are true.
The main process for creating oxygen in the atmosphere was: A- photosynthesis by cyanobacteria B- meteorite impacts C- breakdown of water vapor by ultraviolet radiation D- outgassing during volcanic eruptions
(Q008) The great oxygenation event, which added abundant oxygen to the atmosphere beginning about 2.4 Ga, was due to theGroup of answer choicesappearance of Ediacaran fauna.evolution of photosynthetic organisms in oceans.emergence of multicellular organisms.appearance of photosynthetic plants on land.
Chose the correct statement(s)(a) A very thin envelope of gases that surrounded the earth at the time of its formation.(b) About 600 billion years ago plants and animals were formed on the Earth.(c) The two probable sources of oxygen in the atmosphere are photodissociation of watermolecule and evapotranspiration.(d) The evidence of oxygen in the ocean is noted between 2.5 and 3.0 billion years ago.(a) and (b)(b) and (c)(c) and (d)(a) and (d)
During the great oxygenation event, photosynthesizing bacteria multiplied and thrived. They exchanged matter with other spheres providing good examples of:the atmosphere having a big effect on the biospherethe geosphere having a big effect on the biospherethe biosphere having a big effect on the atmospherethe biosphere having a big effect on the hydrosphere
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