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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.
what is another test for pentoses? what is the positive result for this test?
Explain about the Shade Drying? Shade drying is carried out for products which can lose their colour and/or turn brown if put in direct sunlight. Products that have naturally v
Admission to the Hospital The philosophy of childcare, whether in the home, hospital, or other community agency, should be consistently one of concern and support for the
What is the difference between a hormone and a morphogen? How do they act and what type of development do they control?
Other Complications : Bioprosthetic valves have a tendency for degeneration, calcification or cusp perforation. Current models have overcome many of these problems. Calcification
The Red Data Book Species judged as threatened are listed by various agencies as well as by some private organisations. The most cited of these lists is the Red Data Book. It
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Could you survive on a diet which contained no carbohydrate? It should be possible to survive without carbohydrate as energy can be obtained from fats and proteins.
Define Modes or Techniques for Chromatographic Separation In practice, chromatographic separation may take one of these modes or techniques: Paper chromatography (in w
Q. What is mechanical digestion? In molluscs, earthworms, arthropods, birds and vertebrates, in general, which organs respectively participate in this type of digestion? Mechan
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