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What type of atmosphere characterized the early Earth, and what were the likely compounds present in it?
What type of atmosphere characterized the early Earth, and what were the likely compounds present in it?
A reducing atmosphere with little oxygen, likely consisting of water vapour, nitrogen, carbon dioxide, methane, ammonia, hydrogen, and hydrogen sulphide.
What factors contributed to the synthesis of organic molecules essential for the origin of life on Earth?
What factors contributed to the synthesis of organic molecules essential for the origin of life on Earth?
Volcanic eruptions, lightning, extreme UV radiation, hydrothermal vents, and alkaline vents, along with the Earth's reducing atmosphere.
What is the estimated age of the fossils of micro-organisms that provide direct evidence for life on early Earth?
What is the estimated age of the fossils of micro-organisms that provide direct evidence for life on early Earth?
About 3.5 billion years old.
What process led to the formation of macromolecules such as proteins and nucleic acids from simple organic molecules?
What process led to the formation of macromolecules such as proteins and nucleic acids from simple organic molecules?
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What was the likely outcome of the formation of self-replicating organic molecules on Earth?
What was the likely outcome of the formation of self-replicating organic molecules on Earth?
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What is the term used to describe the evolution of life's biochemical components, such as the development of proteins and nucleic acids?
What is the term used to describe the evolution of life's biochemical components, such as the development of proteins and nucleic acids?
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