EVOLUTION: VOCABULARY part 1 EVOLUTION is change over time. EVOLUTIONARY THEORY is an explanation of phenomena supported by a collection of scientific facts, observation and hypothesis. FOSSILS are preserved remains of ancient organisms found in sedimentary rock (soil type).

NATURAL VARIATIONS are differences among individuals of a species. ARTIFICIAL SELECTION- humans select from natural variations that they find most useful. STRUGGLE FOR EXISTENCE is the competition to obtain food, living space, and other necessities. FITNESS is the ability to survive and reproduce in its specific environment.

ADAPTATION is any inherited characteristic that increases an organism’s chance of survival. SURVIVAL OF THE FITTEST –individuals that are better suited to their environment survive and reproduce. NATURAL SELECTION – when the best survive and pass on beneficial characteristics to offspring without human control; overtime may change population.

VARIATIONS – differences in trait within a species. HOMOLOGOUS STRUCTURE- have different functions but develop from same embryonic tissues. VESTIGIAL ORGAN is an organ that serves no useful function. EXTINCTION – end of a species

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