An ____ is a person or creature from whom others are descended. ____ is the process by which organisms change over time. An ____ helps organisms survive better in their environment. 4. A ____ is a physical or behavioral characteristic passed down. All humans share an ____ with other species. A ____ is a sudden change in a gene. ____ selection favors individuals best adapted to their environment. A ____ is a preserved trace of an ancient organism. A ____ is a group of organisms that can reproduce. A ____ is a misunderstanding or incorrect belief. ____ leads to the disappearance of a species. ____ is the material that carries genetic information. ____ shows how species diverge like branches from a tree. A ____ is an animal with a backbone. A ____ is one stage in the history of a species or family.

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