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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.
A biologist examines a series of cells and counts 140 cells in interphase, 10 cells in metaphase, 4 cells in anaphase and 7 cells in telophase. if complete cell cycle requires 24 h
what is phulum cnideria
Incubator The incubators are essential to provide an ideal micro environment. The main functions are: isolation, maintenance of thermo neutral ambient temperature, desired h
Q. What is H shaped incision and what is it's purpose? This type of incision is especially useful for: The anterior maxilla or mandible. Accurately identified implant
Nucellus - Ovule Enclosed within the integuments lies a homogenous mass of tissue which is termed as the nucellus. This is the tissue in which the female gametophyte differen
Q. For the enzymatic reaction what is the effect of a substance with the same spatial conformation like an enzymatic substrate? How is this kind of substance known? Substances
Q. Describe Explicit and Semantic Memory? Explicit memory: This is the conscious recollection of information such as specific facts or events and at least in humans that can be
Define salient modifiable factors which affect birth weight? The following are the salient modifiable factors which affect birth weight and gestation adversely: Iron deficiency
In protozoans flagella are found always one per cell. Flagella and Cilia can generate substantial force as they try to push or pull a protozoan through water. To be able to do that
What key idea, contained in Malthus's essay on populations, helped Darwin formulates his theory of natural selection?
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