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I/GCSE Biology: The development of a theory 

The development of a theory 

· biology,IGCSE Biology,IGCSE,theory

Do you guys still remember the development of a theory in I/GCSE Biology?

Other theories of evolution

  • Richard Owen explain similarities between species – suggests god created basic plans that developed in different wa1ys
  • Refer to I/GCSE Biology,  Lamarck suggested species could change – most scientists believe they remain the same
  • Lamarck idea – environment caused changes in species and changes were passed on to offspring
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The problem with Darwin’s theory

  • Theory rejected – didn’t consider god as creator
  • Little evidence for natural selection causing change + creating new species
  • Darwin can't explain how CH pass from parent to offspring

The acceptance of Darwin’s theory

  • When it comes to I/GCSE Biology, Theory used to make predictions tested scientifically
  • Beak size of finches in Galapagos Islands when a drought broke out and harder seeds were produced. Birds who ate the most food and had larger, stronger beaks survived. In years beak size should increase.

That's all~

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I/GCSE Biology: Evolution by natural selection 
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I/GCSE Biology Respiration
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