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Darwin & Evolution

Darwin & Evolution

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Darwin & Evolution

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  1. Darwin & Evolution Change Happens…

  2. Evolution • History and prehistory are full of creation stories • People have always guessed at how they “got here”

  3. Evolution • Greeks • Hypothesized ______________________was related to _________________

  4. Evolution • Charles Bonnet • Because fossils rarely looked like modern organisms, there must have been catastrophes after which new life arose • ___________________________________

  5. Evolution • Jean Baptiste Lamarck • Believed ___________________________ • Wrote: ________________________________________ • His work later influenced Darwin.

  6. Evolution- Lamark • ____________________________________________ • Most used structures develop & others waste away • Once a structure is modified it is inherited

  7. Evolution • Weismann • _____________________________________________ with tests on mice • Change in an individual’s life time does not get passed on

  8. Charles Darwin • 1831 ____________________sailed around the world • Arrived at the _______________________

  9. Charles Darwin • Intrigued by the _____________and their __________________________

  10. Charles Darwin • Used _______________________________of slow and gradual change. • Used the ideas of __________________for domesticated animals

  11. Charles Darwin • Thought these processes of change must happen in ____________________________

  12. Charles Darwin • ___________________________________: • (Human) populations that exceed their resources will decline due to war, famine, disease, etc. this must also happen in the wild.

  13. Charles Darwin • Reasoned __________________________ live because it would lead to overpopulation • The ones who were ________________________ _______________would survive

  14. Charles Darwin • The survivors would be the ones to reproduce and pass down the traits that enabled it to survive • _________________________________________

  15. Darwin’s Theory of Evolution • Challenged the popular belief at the time (creation/church) • He held off on publishing it • __________________________came up with a similar theory after working in the Amazon and the Malaysia & Indonesia • They published them together • Wallace gave Darwin all the credit • ___________________________________________________

  16. Darwin’s Theory of Evolution • ________________: Not all young in each generation can survive (disease, starvation, predation, etc) • ________________: There are variations in all populations that are passed on genetically • _____________________: Some variations are favorable – these are adaptations • ______________________: Individuals that survive and reproduce are the ones with favorable variations ___________

  17. Remember! • _______________________________________ ____________; it is independent and happens during genetic recombination • A variation only becomes an adaptation when it is favorable in the current environment.

  18. Divergent evolution • Descendants of a single ancestor diversify because of __________________________.

  19. Adaptive Radiation • One species spreads out to fill __________ _______________________ • Hawaiian Honey Creepers

  20. Convergent Evolution • Analogous adaptations occur in response to __________________

  21. Coevolution • The adaptation of _____________________________ over time

  22. Evolution • Can result in speciation – the formation of a new species from an existing one