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| changes in a kind of organism over time; process by which modern organisms have descended from ancient organisms | ||
| well tested explanation that unifies a broad range of observations | ||
| preserved remains or evidence of an ancient organism | ||
| selection by humans for breeding of useful traits from the natural variation among different organisms | ||
| competition among members of a species for food, living space and other necessities of life | ||
| ability of an organism to survive and reproduce in its environment | ||
| inherited characteristic that increases an organism's chance of survival | ||
| process by which individuals that are better suited to their environment survive and reproduce most successfully, also called natural selection | ||
| process by which individuals that are better suited to their environment survive and reproduce most successfully, also called survival of the fittest | ||
| principle that each living species has decended with changes from other species over time | ||
| principle that all living things were derived from common ancestors | ||
| structures that have different mature forms in different organisms but develop from the same embryonic tissues | ||
| organ that serves no useful function in an organism |
