1 / 19

Darwin’s Tea Party

Darwin’s Tea Party. Biological Adaptation. How do we explain the fact that animals seem so well adapted to their environment? In other words, how did they get body parts and behaviours that are exactly what they need to survive?. Lamarck’s Theory.

unity
Download Presentation

Darwin’s Tea Party

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. Darwin’s Tea Party Biological Adaptation

  2. How do we explain the fact that animals seem so well adapted to their environment? • In other words, how did they get body parts and behaviours that are exactly what they need to survive?

  3. Lamarck’s Theory Called “the inheritance of acquired characters,” included the idea of “use and disuse of parts”. The more you use a body part, the more it is amplified. Or, vice versa, use it or lose it…

  4. Lamarck thought characteristics acquired in an animal’s lifetime (e.g., longer neck of giraffe) could be passed down • This theory is thus called “the inheritance of acquired characters”

  5. Darwin’s explanation • Darwin explains adaptation as due to natural selection • However, he also used Lamarck’s theory!

  6. Adaptation can refer to the process by which a creature gets its useful parts • Or it can mean those useful parts themselves

  7. Camouflage as a form of adaptation

  8. Camouflage is an amazing kind of adaptation

  9. Spot the crab here?

  10. Spot the stick insect?

  11. The wonderful incheumonidae (type of wasp) that eats caterpillars from the inside out!

  12. Echolocation: another adaptation allowing bats to “see” by sonar or sound waves.

  13. Adaptations can be about behaviour, like the web-making behaviour of the spider

  14. Darwin’s theory explains adaptation as a result of natural selection • The theory of natural selection also explains many more facts about the living world. • But how does natural selection work? (See natural selection section in DTP and natural selection PowerPoint

  15. The End

More Related