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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.
Possible mechanisms of increased risk are that hyperhomocystinemia may impair release of nitric oxide form endothelial cells, stimulate proferation of atherogenic smooth muscle cel
In which meiotic division does the separation of identical chromatids occur? After the end of this process what are the ploidies of the new cells? The separation of identical c
Q. From the intestinal lumen through to the tissues - what is the route of nutrients after digestion? Monosaccharides, mineral salts, amino acids and water are absorbed by the
Because RNA is composed of four parts of nucleotides, there are 43 = 64 possible codons, which is 64 possible triplets of nucleotides with several sequences. Furtherm
Explain the Torsional Failure - Root Canal Test a. Occurs when the tip of the rotating instrument blinds (locked) in the canal while the motor continues to rotate the shank of
B i o-security in relation to diseases Bio-security is a strategic and integrated approach encompassing policy and regulatory frameworks to analyze and manage risks in the se
Main Components of Blood Plasma You would recall the various types of cells found in blood. The composition of human blood plasma is given in Table. The very structure of bloo
What is pedigree analysis . How to solve the complicated questions of pedigree . How to identify wheather it is dominant or reccessive its genotype
Q. Explain about Diabetes Mellitus? Diabetes Mellitus is a metabolic disorder characterized by chronic hyperglycemia (increased sugar) with disturbances of carbohydrates, fats
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