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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.
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Physical Stress - Temperature We are most familiar with the plants and other organisms that live at temperatures close to the temperature range in which we are adapted to live
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Ventilation of Gills Various mechanical devices are used to increase the flow of water over the gill's surface. There can be two means of increasing the flow of water over the
Q. What is the main molecule responsible for the absorption of photic energy for photosynthesis? And where is that molecule located in photosynthetic cells? The chlorophyll mol
Why is sub-culturing essential in plant tissue culture? Explain the process of heterosis. How is it dissimilar from inbreeding depression? Where and how is urea produced in
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