How can studying the DNA of organisms and their specific genes provide evidence for how organisms change over ?

As generations and generations go on there are mutations that cause one or many mistakes while replicating DNA. The genes are expressed and it can be postive (faster organism) or negative (weaker organism). Overtime the mutation can become a new trait and a new species is formed that is slightly differnt from other species. EX penguins species there are King penguin vs little penguin.

Explanation:

what school and grade?

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