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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.
LOCOMOTION IN STAR FISH - With the help of tube feet aided by fluid pressure in them. In a tube feet upper ampulla, middle podium and lower sucker present.
Zanamivir (Relenza) Started within 2 days after onset of symptoms, this orally inhaled neuraminidase inhibitor can shorten the duration of illness and may decrease the incide
Aortic Valve Repair : In, acquired AR associated with VSD and prolapse of a cusp, repair is often successful. VSD is closed and at the same time the prolapsed part of
PHYSIOLOG Y OF DIGESTION Food - omnivorous. Digestion - Intercellular. (i) Mechanical - by chewing, deglutinationm, churnning, peristalais. Under control of medulla oblonge
Osteogenesis The term osteogenesis describes essentially two distinctly different phenomena by which bone can become juxtaposed to an implant surface.
harmful and beneficial usesa of phylum porifera
Escherichia coli is generally regarded as part of the normal flora of the human intestinal tract and that of many animals. Serotypes of E. coli which have been implicated in human
Indinavir (IDV, Crixivan) Indinavir has good oral bioavailability. Indinavir 800 mg combined with ritonavir 100 mg (both b.i.d. for ease of use) was comparable in effectiven
Match dehydration reaction and hydrolysis reaction to molecule synthesis and molecule break-down
What is the leaf cuticle? The leaf cuticle is a thin waxy layer made of cutin and waxes on the outer surface of the leaf epidermis. Its function is to control the cellular tran
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