Question

Write short notes on Dawin's Theory of natural selection ​

Answer 1

Explanation:

Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations. Charles Darwin popularised the term "natural selection", contrasting it with artificial selection, which in his v.iew is intentional, whereas natural selection is not.......

Answer 2

Answer:

Charles Darwin proposed the theory of natural selection. It is an important step in the study of evolution..

Explanation:

Theory of natural selection:

1. According to Darwin, 'only organisms which are fit to survive ( the survival of fittest ) get evolved while those who are not fit, get perished.'

2. The nature selects only such fit species and they perform reproduction and thus they get evolved.

3. This theory of natural selection is given by Darwin in his book 'Origin of Species'.

4. Darwin stated this theory after the study of many species of plants an animals.

Some important points of Theory of natural selection:

1. All the living organisms reproduce for a long time.

2. They all compete with each other in a life threatening manner for the survival.

3. The living organisms which can face the environmental changes and show necessary modifications survive, while other perish.

4. Nature selects the only fit organisms also eliminates the weak organisms.

5. Those living organisms which survive reproduce more such offsprings and thereby those species remain for a long time.

Objections to Darwin's theory of natural selection:

1. Darwin stated the whole theory based on only 'natural selection' while some others factors are also responsible for the evolution.

2. Darwin did not mention about useful and useless modifications in living organisms.

3. The causes changes occuing in the living organisms and their rate was not explained by Darwin.

Although there were many objections against Darwin's theory of natural selection, it is accepted as the milestone of study of evolution.