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Serpentes

The name of the ancestors of Serpentes was:
Tetrapodophis

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Snakes most likely originated in the southern hemisphere about 128 million years ago.

While snakes today are found all over the world in a multitude of different places and "show incredible diversity, with over 3,400 living species found in a wide range of habitats, such as land, water and in trees."

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The science of how they lost there legs 

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The science of how they lost there legs 

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Snakes evolved having legs to losing their legs. Now we know that because of a switch of genetic mutation caused snakes to lose their legs. Two researchers found this out by studying snakes and lizards to pinpoint why snakes being so similar to lizards lost their ability to grow legs. Now there I evidence supporting this from researchers stating “Now researchers say a trio of mutations in a genetic switch are why those legs eventually disappeared. Taken together, the mutations in the enhancer of a gene known as “Sonic hedgehog” disrupt a genetic circuit that drives limb growth in snakes.” And that’s why there legs wont “activate”.

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A Interesting video for more information and also one of my sources 

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A Interesting video for more information and also one of my sources 

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UF Health researchers uncover how snakes lost their legs

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https://www.biomedcentral.com/about/press-centre/science-press-releases/20-05-2015#:~:text=They%20most%20likely%20originated%20in,land%2C%20water%20and%20in%20trees.

https://www.nationalgeographic.com/news/2016/10/snakes-grow-legs-evolution/snakes-grow-legs-evolution/