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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.
Increase in population size is known as population growth. It depends upon number of persons added to the population and number of persons lost from the population. Addition in pop
Pseudocoelom - Metazoa The platyhelminths which do not have a body cavity surrounding the gut, have a solid type of body constitution. The mesoderm completely fills the space
The upper or mountain course - Classification of the river Here the water is fast flowing and runs through a 'V' shaped valley with unstable banks. The fast flowing water has
a) In humans, is it the sperm or the ovum which verifies the sex of the offspring? b) Give a reason for your answer. (a) The sperm verifies the sex of the off
#questwhy and where endomitosis happens?ion..
Reproductive Organs In several metazoans, gonads are well-defined. Testes and ovaries take up dissimilar shapes and anatomical dispositions. In cases of certain hermaphrodites
SOME PRECAUTIONARY MEASURES TO AVOID ADDICTION - DEADDICTIO N - First phase of treatment is detoxification. Next phase is of psychotherapy and counselling. Deadi
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Determine about the term - neuropsychology The clinical practice of neuropsychology involves an integration of knowledge bases from the disciplines of psychology, psychometrics
Ecological adaptations in animals to desert environment In response to scarcity of water, animats adcipt vario6s strategies to conserve or prevent loss of water. Most of the de
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