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Ancient DNA of deer was found, and the DNA was from a deer from years and years ago. The DNA in the deer is still the same, but other things have changed through evolution and they look different from each other as well.

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Deer in the beginning look like humans and other organisms. Over time in the womb, they slowly start to turn into deer and get the bodies and features of a deer.

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Vestigial organs of deer are the dew claws. They don't use dew claws for anything really, and antlers don't serve a purpose other than to show they are male.

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Deer have heavy bones like humans and they are mammals as well, but deer grow antlers and have different body structures then us. We walk on two legs, deer walk on four. Deer also have the bodies and legs to run fast and escape easier than humans.

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The genetic drift of the deer is that deer all had lived in the same area, and then they would go and live in other areas and then they would change over time and become "different" species.

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Sexual selection in deer is the female selecting the male. The males chase the females and fight other males to try and win the females over the other male, or they will chase the females until they get tired and then they will mate.

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The evolution of deer is to be believed that they had evolved from antlerless, tusked ancestors. Modern water deer is used as an example.

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Divergent, Parallel and Convergent Evolution. 

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Divergent, Parallel and Convergent Evolution. 

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Deer are part of a parallel evolution. They all look different in ways but live the same life style.

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The migration of deer starts in the winter. They go to warmer areas and while they are migrating, they are in mating season. That way, their genes can go all over instead of staying in one spot and inbreeding.

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V:  There is variation in deer. There is variation in colors, antlers and in the type of species there is.
I: Deer inherent antler growth, size and fur color from their moms and dads.
S: Selection of deer is when you pick the best one out of others.
T: Deer have been around for 3.5 million years, and there is more than 60 species of deer in the world. Deer don't change very often, but they do every hundreds of years.

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Natural selection for deer is like lots of animals. The weak or sick die first usually, but also hunters and other mammal predators are a factor in their natural selection as well.

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Mutation of deer is mainly rare albino fur or rare melanistic fur. They can also have really weird branched out antlers that grow into their heads or grow out in different weird ways.