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Mutations are the only kind of variability generating mechanism in prokaryotes and asexually reproducing organisms. But in eukaryotes where sexual recombination occurs, even in one generation there is a marked reshuffling of genes in the chromosomes which amplifies the genetic variability in a population. The kind of variability generated by recombination is tested by natural selection in as many genetic backgrounds as possible and in as short time as possible (say in one generation). Thus one of the greatest and fundamental advantages of sexual reproduction is the generation of variability. Provided the populations are large, even if mutations do not exist, the mechanism of sexual recombination alone would be generating new genotypes for very long time.
Why Nutrition is important for health Nutrition is one of the basic components of life. It is an essential part of health care. You already know that good nutrition is essent
Q. What are clotting factors? Clotting factors are substances (coenzymes, enzymes, reagents) necessary for the clotting stages to happen. Besides those triggering reagents and
Which of the following is true for the sodium-glucose co-transporter? A. The net flux of sodium ions is from a region of high sodium ion concentration to a region of low sodium
Action potentials include changes in the membrane potential of an axon, as shown in the schematic below. During the refractory period, sodium channels are inactivated and
What are the causes of endodontic pain? Lesions in retreatment cases called post endodontic diseases. Reasons of Endo retreatment; = reasons of failure: - Signs or symptoms of
discuss why obelia is considered to be of special interest in zoology as an animal showing an intermediate grade of organisation
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The volume of Mrs. X's plasma was 3 liters before Ed administered the IV. Assume that there was a complete mixing of the administered water with her plasma but no mixing with her i
Xerarch - Kinds of Succession When the succession takes place in drier area, i.e., the succession progresses from xeric to mesic conditions. It is further subdivided as:
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