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If a giraffe continues to stick its neck out longer to feed on trees overtime its limbs will lengthen. The more time spent sticking its neck out will cause its limbs to grow.

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If there is a pack of wolves who runs faster, making it easier to catch up to prey, they will out live a pack of wolves who are not as fast. The slower pack of wolves will eventually die out because of the evolution of the faster wolves.

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Darwin believed that the traits were passed through natural selection and not as consistently as Lamarck believes.

Lamarck thought that evolution was brought up by the overuse of a trait or feature.

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Both theories believe that traits are passed onto offspring from past generations.

They also both believe that the transfer of traits is a positive, and or gain to the species.

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1. Struggle for existence
2. Variation
3. Origin of species
4. Survival of the fittest
5. Over production.

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All species develop through natural selection in order to boost competition, survival, and reproduction. Small variations of traits get passed to offspring. This theory is popular among very few.

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Lamarcks theory states that a species offspring can genetically gain learned traits. Meaning when a species reproduces they pass traits they have picked up on to their babies.

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In Darwins theory he believes that all species progress through natural selection. He believes that they inherit traits from other generations that improve their survival rates and increases the ability to reproduce.