Pythons and boa constrictors have tiny hind leg bones buried in muscles ... Vestigial legs are a clue that snakes descended from lizards. Over 100 million years ago, some lizards happened to be born with smaller legs, which, ... The ancestor of boas and pythons retained very small vestigial legs
Explanation:
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when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.
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They create genetic variations
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