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What is evolution?

NB #2. What is evolution?. The process in which organisms change over time. Jean-Baptiste de Lamarck. A French Naturalist (studies nature) In 1809, 1 st scientist to propose a theory on evolution. Theory. An explanation that is supported by evidence. Charles Darwin.

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What is evolution?

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  1. NB #2 What is evolution? The process in which organisms change over time

  2. Jean-Baptiste de Lamarck • A French Naturalist (studies nature) • In 1809, 1st scientist to propose a theory on evolution

  3. Theory An explanation that is supported by evidence.

  4. Charles Darwin • A British Naturalist • In 1831, sailed on the HMS Beagle and visited the Galapagos Islands and collected lots of data. • In 1859, he published a book, On the Origin of Species, proposing his theory of evolution.

  5. Organisms acquiretraits and pass them on to their offspring Organisms that are better adapted to their environment survive and reproduce more successfully Lamarck-vs- Darwin

  6. To obtain • A lion runs a lot so he gets stronger leg muscles than the other lions. Because the lion got stronger legs muscles he could then pass this trait on to his offspring.

  7. Having a trait that improves an organisms ability in a particular environment • There are giraffes with long necks and giraffes with short necks. Giraffes like to eat the leaves off of trees. After several years of drought, the short neck giraffes become extinct due to lack of food. But, the long neck giraffes can reach the tops of trees to continue to get their food.

  8. Who do you agree with? LamarckDarwin Traits were Certain inherited acquired traits allowed an and passed organism to to offspring survive better in a particular environment

  9. The Carefully Concealed Colors Caper • Read the paragraph……. • Think about how your assigned naturalist would explain ……. • Where did the green trait come from? • Why are most of the Zirconians green and not red when the astronauts returned? • Pair up and Share your findings. (Take notes if necessary)

  10. Video Clip • Write down 5 facts. • Be prepared to submit one test question from your facts. • Clip:

  11. Adaptation Natural Selection Species Speciation Homework: Word WebsComplete an organizer for each word

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