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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.
What is a biome? A biome is a prevailing ecosystem constituted by same biotic and abiotic factors present in one or more regions of the planet.
Explain about the Prebiotics? Ingredients/compounds that have a beneficial effect on microflora in the large intestine of the host e.g. fibre, fructo oligosaccharides, lactulos
a) In what form do plants absorb calcium from the soil? b) List any two calcium deficiency symptoms in plants.
What is pollen? Pollen grains are the male gametophytes of the phanerogamic (flowering) plants. Thus within the pollen grains the male gametes of these plants are produced by m
What do you mean by Advanced characters The traits, or characteristics, that an animal has that are not ancestral to the taxon. They appear later in the evolutionary history of
Alanine cycle Alanine Cycle : In the alanine cycle the pyruvate formed from glycolysis in the muscle is converted to alanine by transamination reaction. Alanine is rele
Scaling Instrumentation of prothesis Although stainless steel is generally the most effective material for removing calculus, it cannot be used with implants, because it scratc
Maintenance and Regulation of Peripheral Circulation Pressure receptors (baroreceptors) located in the wall of the internal carotid arteries and in the arch of aorta, when
how do you define sex
Solar Energy Input We know that the spectral distribution and the intensity of solar radiation incident on the earth's surface are known. Of the enormous'amount of energy that
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