BIOLOGY - EVOLUTION.

BIOLOGY - EVOLUTION.
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  • The Beginning
  • A few months later...
  • vff
  • The things that he could do... 
  • One day, a finch met a new species of bird on the Galapagos Islands. Eventually the birds had attracted, causing them to sexually reproduce, which resulted in an offspring. 
  • Another generation...
  • They produced an offspring, who was a combination of both parents. However, he had a bigger head, bigger body and he had different feet. This was due to the different alleles from both parents, causing genetic variation. 
  • Genetic Variations
  • Because of his new features, he was able to adapt to his environment in a better way, like his beak, which developed, allowing him to acquire different food sources.
  • How did Darwin use the Finches to support his theory?
  • He later on met another bird and sexually reproduced, resulting in another genetically varied bird. As the generations increased, the variations increased, causing different phenotypes in the offspring. 
  • These genetic differences are clearly shown in different generations as the size of their beaks enlarging, allowing the birds to catch their prey in a more easier manner and to vary their prey. Their beaks are quite similar to other species of birds shown above. 
  • These Finches are the same species of birds, however with different variations, they have acquired different parts which allow them to increase their functionality. 
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