10 1 early ideas about evolution
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10.1 Early Ideas About Evolution. What is evolution?. Evolution is the process of biological change by which descendants come to differ from their ancestors. Evolution is a central theme in all fields of biology today. Charles Darwin.

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10.1 Early Ideas About Evolution

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10 1 early ideas about evolution

10.1 Early Ideas About Evolution


What is evolution

What is evolution?

  • Evolution is the process of biological change by which descendants come to differ from their ancestors.

  • Evolution is a central theme in all fields of biology today.


Charles darwin

Charles Darwin

  • Natural selection was the theory he proposed to explain evolution.

    • He attempted to provide reasons for the biological diversity on Earth.

  • However, Darwin was not the first scientist to study evolution.


4 scientists before darwin

4 Scientists before Darwin…

  • Carolus Linnaeus

  • Georges Buffon

  • Erasmus Darwin

  • Jean-Baptiste Lamarck


Carolus linnaeus

Carolus Linnaeus

  • In the 1700s, he developed a classification system to help organize all types of organisms into categories based on their similarities.

    • Scientists still use his classification system today.


Georges buffon

Georges Buffon

  • He proposed that species shared ancestors rather than arising separately.

    • Species is a group of organisms so similar to one another that they can reproduce and have fertile offspring.


Erasmus darwin

Erasmus Darwin

  • Charles Darwin’s grandfather

  • Proposed that all living things were descended from a common ancestor and that more-complex forms developed from less-complex forms


Jean baptiste lamarck

Jean-Baptiste Lamarck

  • He believed that species evolved into different forms rather than becoming extinct…flawed idea!


Jean baptiste lamarck1

Jean-Baptiste Lamarck

  • He proposed the idea of inheritance of acquired characteristics:

    • changes in an environment caused an organism’s behavior to change

    • this would lead to greater use or disuse of a structure or organ.

    • the structure would become larger or smaller and would then be passed down to offspring

      • For example: giraffes’ long necks


10 1 early ideas about evolution

So….

Darwin based his studies on the work of these four men and developed his theory known as evolution by natural selection.


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