Charles Darwin studied life sciences in the mid to late 19th century, and his theory of how evolution progressed was based on natural selection. Through the study of life sciences, Darwin saw that over long periods of time, through the process of evolution, certain species and traits would continue to progress and reproduce while others would die off, not allowing their traits to be passed onto following generations.
Darwin saw this process as a natural selection, where whichever living organism that was able to adapt favorably to changing environments or conditions would be selected to continue to reproduce, passing on its favorable traits to the next generation.
If a living organism had unfavorable traits (for example- short legs, small eyes, or a genetic disorder) which prevented it from living successfully (acquiring nourishment and defending itself) then it would most likely die and not produce offspring with the same deficient characteristics. These being the species or traits NOT selected to continue.
In the introduction of Charles Darwin's book On the Origing of Species, he explains his theory: "As many more individuals of each species are born than can possibly survive; and as, consequently, there is a frequently recurring struggle for existence, it follows that any being, if it vary however slightly in any manner profitable to itself, under the complex and sometimes varying conditions of life, will have a better chance of surviving, and thus be naturally selected. From the strong principle of inheritance, any selected variety will tend to propagate its new and modified form."
"This preservation of favourable individual differences and variations, and the destruction of those which are injurious, I have called Natural Selection, or Survival of the "Fittest."
It means that an organism that is more fit to the enviorment will live longer and reproduce until the species that is not as fit for the enviorment is gone.
Survival of the fittest would be used to describe this situation.
Its a chicken and egg situation. Adaptation is the response to Natural Selection, and Natural Selection is the response to Adaptation. They both operate by the principle: the members of any species that are best adapted to their environment are the ones most likely to survive and reproduce the next generation, where the process repeats. That does not mean the strongest or most aggressive, they often get themselves killed off.
artificial selection
Fitness is generally measured in average number of fertile offspring.
Adaptation does not allow for natural selection: natural selection causes adaptation.
natural selection
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which is not part of darwins theory of natural selction
Darwins theory of evolution :)
The principle of evolution by means of natural selection.
Survival of the fittest
natural selection
fittest
There are alternate versions of a gene.
please answer
Also known as Darwins theory of Natural Selection, as in survival of the fittest.
Random processes are not part of the theory of evolution by natural selection. Excepting random genetic mutation that provides the variation natural selection works on.