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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.
Q. Nutrient requirement during angina pectoris? The nutrient requirement here is the same as discussed earlier, however, to sum up it can be said that we need to restrict calor
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Radioactive Labelling Radioactive labelling method has been effectively applied on the chick blastoderm. The method includes labelling one embryo (donor) and grafting a part
Q. Why does not a long lasting vaccine against common cold exist yet? Viruses that present a high mutation rate like the virus that causes the common cold escape easily from th
Q. What is the evolutionary importance of pteridophytes? As the first pteridophytes, tracheophytes were also the first plants to extensively colonize the terrestrial environmen
Q. Adverse effect to intestinal mucosa? Alcohol: Alcohol is known to cause damage to intestinal mucosa independent of gastric acid content. Thus high amounts are not advised.
which animal have most developed mandible
Wind pollinated flowers are: 1. Small, brightly coloured, producing large number of pollen grains 2. Small, producing large number of dry pollen grains 3. Large producing
Thickness and toughness of plant walls are increased by deposition within original cellulose wall, of a substance called as lignin. Process of deposition is called: a) Lignific
How are they produced?
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