1 / 17

EVOLUTION

Explore the various evidences of evolution, including paleontology, geographical distribution of organisms, comparative anatomy, embryology, and comparative biochemistry. Learn about the development of different species such as the horse and whale, the impact of geographical isolation on adaptation, and the theories of Lamarck and Darwin. Understand the mechanisms of evolution, including variation, natural selection, and speciation.

harrisonthomas
Download Presentation

EVOLUTION

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. EVOLUTION Life on earth began as simple and primitive forms, by natural selection, over a long time various complex organisms form

  2. 1. Paleontology 2. Geographical distribution of organisms 3. Comparative anatomy 4. Embryology 5. Comparative bio-chemistry Evidences of Evolution

  3. Paleontology Study of fossil: Differences between ancient and recent form of an organism

  4. Development of Horse

  5. Development of Whale

  6. Owing to geographical isolation, organisms adapted to that isolated habitat and become different. (adaptive radiation) Geographical distribution of organisms

  7. Migration between continents

  8. Finch Beak

  9. Galapagos tortoise

  10. Comparative anatomy Homologous structures as pentadactyl limb have same fundamental structure but different function

  11. Eye Evolution

  12. Embryology Although adult structure is different, structure in embryonic stage is similar.

  13. Comparative bio-chemistry

  14. Lamarck’s Theory Change in environment Organism modify itself More used organ enlarge Less used degenerate The acquired character is inheritable Darwin’s Theory Change in environment Population has inborn different Some good feature fit the environment survive (natural selection) These reproduce and become new species Mechanism of Evolution

  15. 1. Variation : Mutation and sexual reproduction • 2. Natural Selection: The fittest has better chance to survive • and reproduce • 3. Speciation: New species formation is caused by isolation • Geographic isolation: physical barrier • Ecologic isolation: different season or zone in habitat • Reproductive isolation: different reproductive behavior • Genetic isolation: genetic different due to isolation Neo-Darwinism

  16. Example

More Related