On his journey with the HMS Beagle, ____ studied many different living organisms. Darwin realized that organisms that were best suited to an environment were the ones most likely to ____. The process where organisms that are best suited for their environment survive and go on to produce more offspring is called ____. Certain individuals have traits that help them survive better in their environment, these are called ____. The idea that organisms change so much they are different species. This is called ____.

5.07 Evolution

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