Prokaryotes are considered to have evolved how many years ago?
Correct answer: D. 3.5 billion years ago
- A. 1.5 billion years ago
- B. 4.5 billion years ago
- C. 1000 million years ago
- D. 3.5 billion years ago
Explanation
Prokaryotes are believed to have evolved approximately 3.5 billion years ago, making them some of the earliest forms of life on Earth. This time frame is based on fossil evidence and geological data. The incorrect options either suggest a time too recent or coincide with the formation of Earth, which is too early for the appearance of life. Understanding the timeline of Earth's history helps in placing the evolution of prokaryotes in context.
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About Evolution
Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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