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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.
Which of the following serves as a sensor, or as part of a sensor, that functions only in a negative feedback system and not in a positive feedback system? A. CaSRs (Calcium-Se
The kind of epithelium which forms the inner walls of blood vessels is : 1. cuboidal epithelium 2. columnar epithelium 3. ciliated columnar epithelium 4. squamous epith
Plants are supplied with adequate amount of phosphorus Phosphorus has also been associated with early maturity of crops particularly the cereals. Its shortage is accompanied by
explain briefly about ICZN
Determine the term - techniques visualise anatomy Some techniques visualise anatomy, provide objective confirmation of structural abnormality. These include neuroradiological i
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We now understand that mutations that cause the inhibition of apoptosis are found in tumors. Because proliferation itself is not induced by the inhibition of apoptosis, explain how
GRADIEN T THEORY - It was given by T. Boveri & was supported by M.C. Child. Child called it as metabolic axial gradient theory. According to it, the egg has distinct ani
Dormancy - Plant Growth Substances Dormancy can be defined as a state of suspended growth and metabolism. When most plants are exposed to seasonal periods of very inclement we
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