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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.
Q. What are the five human digestive secretions? Which of them is the only pne that does not contain digestive enzymes? The human digestive secretions are: bile, saliva, gastri
List host factor which play important role in implant survival. Host factors: a) Medical status of the patient b) Habits - Smoking - Parafunctional habits c) O
what is detergent pollution and it''s effects and causes
What is the swinging flashlight test used for It is done to check the relative afferent pupillary defect in an eye that is blind from optic nerve disease.
Primitive Arthropods The primitive arthropods, Onychophora (for example Peripatus) have a series of paired legs which are not jointed but have a ringed appearance because of t
Amniocentesis is a way of prenatal testing in which the amniotic fluid is withdrawn from the uterus by the help of a needle. The fluid and the fetal cells it contains are analyzed
Q. What are the classes into which the phylum Echinodermata is divided? The five echinoderm classes are: asteroids (starfishes), ophiuroids, crinoids, holothuroids (sea cucumbe
What is the structure of the adult fern within which cells undergoing meiosis can be found? In these plants meiosis takes place within structures known as sorus (plural, sori),
Q. What are imago and nymph? Nymphs are larvae of hemimetabolic insects (like grasshoppers). They are very similar to the adult insect although smaller, In holometabolic insect
Viscosity Viscosity, as you may already know, is associated with fluid flow. It is the internal friction which tends to bring to rest portions of the fluids moving relative to
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