What does Oparin-Haldane Hypothesis assume about Earth’s primordial atmosphere? Why would this have been important for the origin of biologically significant molecules?
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What does Oparin-Haldane Hypothesis assume about Earth’s primordial atmosphere? Why would this have been important for the origin of biologically significant molecules?
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- Why is the reducing nature of early Earths atmosphere key to the OparinHaldane theory of the origin of molecules necessary for life?What is the most accepted hypothesis on the origin of life on earth? How does it compare to the other main hypotheses?the landmark experiment by Miller and Urey, and various repeats of this experiment, did not successfully recreate life itself, but why do we consider the results from this experiment as support for the origin of life on Earth?
- Historically, how has the origin of life on earth been explained?What evidence is there for the hypothesis that life originated on Earth by the creation and polymerization of small organic molecules by natural processes?Why is the Miller experiment important even though it did not create life nor did it duplicate the conditions of Earth’s early atmosphere?
- In the 1950s, scientists Miller and Urey conducted a classic experiment in which water, methane, ammonia, and hydrogen were sealed in a flask containing a pair of electrodes. An electric spark was fired between the electrodes, and after a week's time, they found that amino acids were present in the flask. Which of the following best explains the significance of this experiment in explaining the origin of life on Earth? A. It showed that any raw materials could produce the compounds necessary for life to exist on early Earth. B. It showed that life must have started somewhere else since organic compounds only come from living thin C. It showed how biological molecules can be formed from the very simple molecules that were available on early Earth. D. It showed how lightning can cause organic matter to decompose into amino acids, which were the first molecules on early Earth.Which of the following was the least likely objective of the Urey-Miller experiment? Group of answer choices To demonstrate that oxygen can be produced by plants. To recreate the conditions of the Earth before life existed and produce the molecules necessary for life from primordial inorganic matter (water, methane, ammonia, and carbon dioxide). To build a case (though not necessarily prove) that life can originate from nonliving matter through natural means. To demonstrate that organic molecules like amino acids (building blocks of protein) and nucleotide bases (building blocks of DNA) do not necessarily originate only from living matter. To demonstrate that lightning may have been the essential energy source (early in Earth's evolution) in the production of molecules essential for life.Are the three methods/hypotheses of producing the building blocks of life on earth mutually exclusive? Why or why not? Is there evidence that supports all three proposed mechanisms