(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.
Question
(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.
Solution
The great oxygenation event, which added abundant oxygen to the atmosphere beginning about 2.4 Ga, was due to the evolution of photosynthetic organisms in oceans.
Here's the step-by-step explanation:
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The great oxygenation event is also known as the Oxygen Catastrophe, Oxygen Crisis, Oxygen Holocaust, Oxygen Revolution, or Great Oxidation.
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It was a significant event in Earth's history, which occurred approximately 2.4 billion years ago (Ga).
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This event marked a major shift in the composition of Earth's atmosphere, from being largely devoid of oxygen to an environment with an abundance of this gas.
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The primary cause of this event was the evolution of photosynthetic organisms in the oceans.
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These organisms, known as cyanobacteria, began to produce oxygen as a byproduct of photosynthesis.
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Over time, the amount of oxygen these organisms produced began to accumulate in the Earth's atmosphere, leading to the great oxygenation event.
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The other options - appearance of Ediacaran fauna, emergence of multicellular organisms, and appearance of photosynthetic plants on land - are not the primary causes of the great oxygenation event. These events occurred much later in Earth's history.
Similar Questions
How did Earth develop an oxygen-rich atmosphere?Question 58Select one:Photosynthesis by algae released oxygen, which accumulated gradually.The Earth was bombarded by oxygen-rich comets which also filled the oceans with water.Sunlight broke water down to form oxygen and hydrogen.The weathering of rocks released oxygen in the rock cycle.
(Q002) The Earth's atmosphere began as nitrogen and oxygen, left over from the solar nebula. acquires its carbon dioxide from photosynthesis by green plants. gets warmer as its carbon dioxide concentration goes down. became more oxygen-rich during the Proterozoic, after the evolution of photosynthetic organisms in the Archean
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
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
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
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