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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.
How many cells are in the human body? According to "The Handy Science Answer Book" noted by the Science and Technology Department of the Carnegie Library of Pittsburgh (1994) th
Industrial melanism refers to the dark pigmentation that evolved in some insects giving them protective coloration on vegetation darkened by soot in heavily industrialized areas pr
If dimples may be considered a single-gene dominant trait, and 64% of the population features dimples, calculate the frequencies of heterozygotes and both types of homozygotes, ass
Can enhancers work in trans? That is, can an enhancer on one piece of DNA activate a promoter on another piece of DNA. Propose an experiment to test this. Be sure to discuss any ap
CONCEPT OF NURSING UNIT: Concept in the design and facilities of nursing unit has been changed time to time based on the different categories of patients and peculiarities of
Biota of Littoral Zone This zone is the shore region of the marine ecosystems and is subject to violence of waves and tides, fluctuation of water level and variability of temp
High blood pressure (hypertension) has gained considerable significance because it will eventually damage end organs like the heart, brain, kidneys and the eyes. It is estimated th
Define Factors that Affecting the BMR? Basal metabolic rate, we know, is the largest component of the daily energy demand representing 45 to 70 percent of daily total energy ex
Determine the extracellular concentration of TVA Consider Neuron B in the frog central nervous system whose plasma membrane has a previously unknown channel that is selectivel
Q. Causes of oesophagitis? The causes include tissue erosion by hydrocliloric acid (EIC1) and pepsin, with symptoms of substernal burning, cramping, pressure sensation or sever
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