DARVIN THEORY OF EVOLUTION,DARVINISM.pptx

Darvin theory

1. DANRVIN THEORY OF EVOLUTION BY DEVASHISH SHUKLA M.Sc.ZOOLOGY 1 st SEMESTER UV. SANSKAR MAHAVIDYALAYA LATORI (CG)

2. -THE ORIGIN OF SPECIES yes

3. INTRODUCTION:- Charles Darwin (1809-1882) was a British naturalist, geologist, and biologist who is best known for his theory of evolution by natural selection. mutations are naturally selected, and lower mutations are automatically eliminated. birth 12january 1809 ship: bigle 5year travel

4. The

5. NATURAL SELECTION: Genetic drift non random mating migration gene flow mutation

6. How does the variation arise? Due to genetic variation DuriNg reproduction Genetic + Darvin theory = synthetic theory of evolution

7. Conclusion The theory of evolution by natural selection, developed by Charles Darwin and Alfred Russel Wallace, states that all species of organisms are descended from a common ancestor and have evolved over time. The theory is based on the following concepts:

Natural selection: Organisms with traits that help them survive and reproduce tend to leave more offspring, which pass on those traits to the next generation.

Descent with modification: Species change over time and give rise to new species.

Variation: Individuals within a species have subtle differences, or variations, that distinguish them from their parents. Some variations can give individuals advantages, such as better camouflage or speed.