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Darwin put fort the notion of the survival of the fittest. How do we define 'fittest'? The answer usually given is those who survive. So you can readily see that this is a circular agrument and doesn't really help us understand what really happens following natural selection quite clearly. The idea of fitness as a matter of survival will not do. Therefore in the course of the development of what we have earlier referred to as the modern synthesis the notion of fitness was related to the ability of the individual to maximise the number of progeny left in the next generation. In other words the notion of fitness was translated into reproductive success. Given the idea of fitness as being measurable in terms of reproductive success we can now go back to basic tenets of Darwinism. The first of the five observations mentioned therein was the tendency on the part of living organisms to reproduce: In an exponential manner. We noted that the consequence of this is competition for available resources which results in "the survival of the fittest" Clearly, therefore. in3terms of reproductive ability nature is truly prodigal.
Sympatric speciation can be regarded as speciation where parent species gives rise to a daughter species without the individuals of a species being separated by space or territory.
Explain Procedure for Gram Staining of Bacterial Cultures? Now carry out the exercise following the steps enumerated herewith. 1. Prepare bacterial smear on a clean, non-gre
Indications for Surgery: In a mixed lesion, either regurgitation or stenosis may be dominant and decision of surgery depends on the haemodynarnics. At the time of surgery on othe
Complete feed system in ruminants Complete feed system for feeding dairy animals is a departure from conventional individual rationing method. It involves the self-feeding of
Q. Surgical Treatment of mitral stenosis? Available surgical treatment modalities include closed mitral valvotomy, open mitral valvotomy, and mitral valve replacement. With th
Determine Vitamin A requirements of school children and adolescents? The vitamin A requirement of children and adolescents has been computed from growth curve interpolation dat
MECHANIS M - Tergo-sternal muscles are relaxed. Volume of cavity is increased and pressure is decreased. To full fill the pressure air comes through the passage & mixed
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Cold Chain System Vaccines are sensitive to heat. On exposure to heat their potency is lost. Once a vaccine has lost its potency it cannot be regained, so it is important
mendal laws
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