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Lastly I know that natural selection in 1976 through 1978 changed in the medium ground finch population to increase in size by evidence three because it is showing that when the drought occurred there was drastic changes in their beak through 1976 and 1978, so them showing what the depth was of their beak throughput the years shows that it did increase in size so they could have there valuable source of food.

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Secondly I know that natural selection in 1976 through 1978 changed in the medium ground finch population to increase in size by evidence two because it is showing us the rait in which the drought came in which proves that when the drought occurred there were major drops and increases in the drought causing the ground finch to have a harder time to change for the population to have there beak increase or decrease to find a source of food and to survive during the drought.

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I know that natural selection in 1976 through 1978 changed the medium ground finch population to increase in size by evidence one because the portulaca seed was a very important seed to the ground finches and when the drought occurred there lack of food went down causing them to find another lockable food source that the birds can depend on during the drought.

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Lastly the beak sizes when we compared them through 1976 and 1978 there were drastic changes because of the drought i know this because the depth in 1976 was 9.5mm and the depth in 1978 was 10.4

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When the drought happened there was approximately 130mm in 1776 and there was 20mm in 1977 and lastly 540mm in 1978

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there was a lack of the portulaca seed during the drought... this caused there to be 10 seeds in 1976 and only 0 in 1977 and 1978...

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We believe natural selection in 1976 through 1978 changed by the beak of medium ground finch population to increase in size

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Which microevolution caused the beak of the medium ground finch population to increase on daphne major from 1976 to 1978