EVOLUTION
THE ORIGIN OF LIFE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a. Photosynthetic organisms developed after dinosaurs
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. b. Prokaryotic organisms evolved from rocks.
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c. Organic molecules formed from common inorganic molecules.
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d. Organisms developed first on land then moved into the oceans.
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Detailed explanation-1: -The most accepted theory for the origin of life is Oparin-the Haldane theory. Reason for acceptance of this theory: This theory states that from the abiogenetic material organic molecules could be formed in the presence of an external energy source.
Detailed explanation-2: -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-3: -Many scientists believe that RNA, or something similar to RNA, was the first molecule on Earth to self-replicate and begin the process of evolution that led to more advanced forms of life, including human beings.
Detailed explanation-4: -Darwin’s theory of evolution by natural selection opened the way for the modern view of the origin of life (see FAMOUS GEOLOGISTS | Darwin).