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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.
Scanning Electron Microscopy (SEM) While 'TEM is useful to study the internal structul-c of thc ccll. SEM is an important technique if you wish to examine the surl'ace features o
Q. Explain Cardiac calcification? Pericardial Calcium is most dense in the atrioventricular grooves and is seen as thick oblique circles or arcs of calcification. From th
Define drug effects on food intake - cause dry mouth? cause dry mouth (xerostomia) : Lack of saliva makes it difficult to masticate and swallow foods, especially those of a dry
What is an etiological agent of disease? An etiological agent of disease is the agent that causes the disease. It might be a living being, substance or environmental fact.
describe the effects of the failure of the pancreas to produce sufficient insulin
Q. How is heart contraction triggered? Heart contraction is independent from neuronal stimulus although it can be modulated by the autonomous nervous system in the heart there
Meaning of Statistical Investigation: An investigation means a systematic search for the knowledge or the truth. In statistical investigation the search for the knowledge is do
Q. Vitamins requirement during myocardial infarction? The requirement of vitamins and minerals is largely governed by the existing nutritional status and the clinical parameter
Q. What is commensalism? The Commensalism is the ecological interaction in which one individual benefits while the other is neither benefited nor harmed. The Commensalism is a
Infective endocarditis (IE) is a microbial infection of the endothelial surface of the heart. The characteristic lesion, the vegetation, is a variably sized amorphous mass of plate
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