write short note on Darwin's theory of natural selection
Answers
Because of natural variation and excess offspring, Darwin defined the natural struggle in the world as competition. This states that some offspring are more likely to survive than others. ... Modern genetic theory uses his concept of natural selection to this day to define genotype, or an organism's genetic map.
1 charles Darwin proposed the theory of natural selection after making many observations on different specimens. He published a concept ' survival of the fittest ' .
2 Darwin explains this concept as follows: All the organisms reproduce prolifically. Therefore, there is always a competition for food ,mate,etc.Only those organisms survive which show the adaptations for sustaining this struggle.
3 Natural selection plays important role by selecting only those organisms which are fit to live.
Those that do not have better adaptations, perish. Selected sustaining organisms then perform reproduction and form new species in a very long period of time.
4 Darwin published his views in the book entitled 'Origin of Species '.
Taken from 21 most likely of std 10.