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This is the Portulaca seed the the smaller beaked birds would eat.

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This is the tribulus seed, the bigger beaked bird could eat.

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When the drought occurred they only got 20 mm of rain in 77', 130mm in 76' and 40 mm in 78'. The portulaca died off. The tribula seed survived, but it was extremely hard to open. Only the bigger beaks could open it and eat. So all the littles died off.

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Lasly to prove Natural selection would be the drought that happened in 77'.

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The also proves the claim of Natural selection because as time went on the beak gradually mutated longer and longer.

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The beak length increased from an average of 10.71 in 76' to an average of 11.61 in 78'.

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This piece of evidence proves our claim because, natural selection says that there was one gene and then everything fro that mutated. So as time goes on the gene keeps mutating and the depth becomes wider.

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The beak depth increased from an average of 9.65 in 76' to an average of 10.55 in 78'.

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Natural Selection cause the beak of the medium ground finch population to increase on Daphne Major from 1976 to 1978.

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Which Microevolution caused the beak of the medium ground finch population to increase on Daphne Major from 1976 to 1978.