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Stack #84200

Stack #84200 Darwin's Theory of Evolution

TermDefinition
Evolultion Change in a kind of organism over time; process by which modern organisms have descended from ancient organisms
Theory Well tested explanation that unifies a broad range of observations
Fossil Preserved remains or evidence of an ancient organism
Artificial selection Selection by humans for breeding of useful traits from the natural variation among different organisms
Struggle for existence Competition among members of a species for food, living space, and the other necessities of life
Fitness Ability of an organism to survive and reproduce in its environment
Adaptation Inherited characteristic that increases an organism's chance of survival
Survival of the fittest Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called natural selection
Natural selection Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest
Descent with modification Principle that each living species has descended, with changes, from other species over time
Common descent Principle that all living things have a common ancestor
Homologous structure Structures that have different mature forms in different organisms but develop from the same embryonic tissues
Vestigal organ Organ that serves no useful function in an organism
Created by: Diana Key
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