1 / 19

What is Evolution?

What is Evolution?. Chapter 4.1 and 4.4. What conditions in the environment cause these 2 examples to survive and develop over thousands of years?. Locate the animal. Locate the animal. Locate the animal. Evolution. Genes control the inherited traits of organisms.

krikor
Download Presentation

What is 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. What is Evolution? Chapter 4.1 and 4.4

  2. What conditions in the environment cause these 2 examples to survive and develop over thousands of years?

  3. Locate the animal

  4. Locate the animal

  5. Locate the animal

  6. Evolution • Genes control the inherited traits of organisms. • Evolution can only occur when the gene pool of the population changes.

  7. Evolution • The 1st organisms were very simple and have become complex over billions of years. • Species group of organisms that look alike & can reproduce among themselves.

  8. Evolution • Many species have become extinct, while others have taken their place. • Japanese Wolf Wolf

  9. Evolution -process by which species change over time. Evolution

  10. Adaptations • All organisms have adaptations which are traits that help them live in a certain environment.

  11. Structural Adaptations Appearing camouflaged Webbed feet of a duck Long trunk of an elephant Behavioral Adaptations Opossums play dead A spider’s web spinning Bird’s courting dance Adaptations help organisms get food, avoid predators, reproduce, move from place to place, etc.

  12. Mutation • A sudden change in a gene is called mutation. • If the mutation is helpful, it will be kept and passed onto future generations and the specieswill change. **A NEW SPECIES** • If the mutation is harmful, the individual organism will die without passing on the trait.

  13. Natural Selection Nature favors the survival of organisms that are best suited/adapted for survival in their environment. Charles Darwin’s Theory of Evolution

  14. Overproduction Not all offspring willsurvive due to food supply, living space, or predators. Parts of Natural Selection

  15. Struggle for Existence Competition among a species to survive. Only a few will reproduce and others will die. Parts of Natural Selection

  16. Variation Offspring are not alike. They have different traits. With traits favorable to their environment, they are the ones who will survive. Faster Stronger Colors Parts of Natural Selection

  17. Survival of the Fittest Some variations of an organism make them better suited for the environment and they will survive. Parts of Natural Selection

  18. Parts of Natural Selection • Evolution of New species • Organisms with favorable traits will continue to survive and pass on these traits to their offspring. The organism with the unfavorable traits will die. Over many generations, the changes can result in the appearance of a new species.

More Related