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Explain how early RNA molecules might have been able to respond to natural selection.
Every RNA molecule might have competed with slightly dissimilar RNA molecules for nucleotides. An RNA molecule that was more successful in getting nucleotides would have an advantage, and it would pass that advantage on to the new RNA molecules it formed by replicating.
Was there molecular oxygen in the earth's primitive atmosphere? How has that molecule become abundant? The presence of the molecular oxygen in the primitive atmosphere was prob
Health And Economic Development - Linkage And Impact It is apparent that the relationship between health and development is a two wayprocess. While healthy people in a country
examples of heterotrophic nutrition
Q. What are the Symptoms of Mitral stenosis? The cardinal symptom of mitral stenosis is dyspnoea on exertion. Typically it progresses over a period of years. As the severity in
Define Tests to Measure Flexibility Component in the Humans? The flexibility component measures the elasticity or range of motion around a joint. This component of physical fi
Lower Respiratory Tract: Trachea: Trachea or windpipe is 12 cm long, 2.5 cm in diameter lying in front of the esophagus and ends opposite the fourth dorsal
define respiration in diffrent types of animals
Tetrasporic Embryo Sacs In this group neither of the meiotic divisions is accompanied by wall formation so that at the end of meiosis all the four haploid nuclei remain in a
Give a detailed description of stereoblastula, please ?#
Explain Surface properties of proteins The surface properties relates primarily to surface tension, a) Emulsification and b) Foaming characteristics of proteins,
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