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Evolution

Across
Structures that are similar in function but did not come from a common ancestor
Characteristic that can be passed on to offspring
Competing for food, space, or other resources
When a favorable trait helps a species survive and reproduce to pass on the trait
Similar structures that related species have inherited from a common ancestor
The process of gradual change over time of a species
All the genes in an organism
Passing of traits from parent to offspring
Down
Any difference between members of a species
A trait that helps an organism survive and reproduce
Group of organisms belonging to the same species
The study of the distribution of animals and plants
Preserved remains of animals, plants, or other organisms
Form of DNA that is tightly woven and packed
Any change in DNA of a gene or chromosome
A segment of DNA on a chromosome that codes for a specific trait
A group of similar organisms that can reproduce with each other
Different versions of a gene