Theory of Evolution

Darwin theory of Natural selection:-

• Proposed by Charles Darwin in 1859.
• Evolution occurs through Natural selection.
• Individual with traits better suited to the environment survive, reproduce, and pass on those traits.

Survival of the fittest:-

• Means organism best adapted to the environment.
• Fittest doesn’t mean strongest but most suitable for survival.
• Over generation, these traits become common in the population.

Evolution by artificial selection:-

• Involves human intervention to select and breed organism with desirable traits.
• Example:- farmer breed plant and animals for size, yield  and colour. Etc.

Wild cabbage example:-

• Different vegetable like broccoli, cauliflower, evolved fro, wild cabbage.
• This happened through artificial selection over generation by humans.

Evolution is not equal to progress

• Evolution does not always means improvements or progress.
• It means change with adaptation to environment.
• A more evolved organism is not necessary more advanced.