EVOLUTION
THE ORIGIN OF LIFE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The scientific explanation of the origin of life on Earth is based on evidence gathered throughout the physical and life sciences. What is the common thread of the different theories of the origin of life on Earth?
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Lightning caused living organisms to form.
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Lightning provided energy for cell membranes to form.
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The earliest life-building compounds were organic and contained carbon..
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The early Earth’s atmosphere was similar to what we see now.
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Explanation:
Detailed explanation-1: -Many scientists favor the RNA world hypothesis, in which RNA, not DNA, was the first genetic molecule of life on Earth. Other ideas include the pre-RNA world hypothesis and the metabolism-first hypothesis. Organic compounds could have been delivered to early Earth by meteorites and other celestial objects.
Detailed explanation-2: -The Miller-Urey experiment, conducted by chemists Stanley Miller and Harold Urey in 1953, is the classic experiment on the origin of life. It established that the early Earth atmosphere, as they pictured it, was capable of producing amino acids, the building blocks of life, from inorganic substances.
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