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Darwin's Theory of Evolution
Miller Ch.15
12
Biology
9th Grade
05/14/2009

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Term
evolution
Definition
change over time
Term
theory
Definition
a well supported testable explanation of phenomena that have occurred in the natural world
Term
fossils
Definition
the preserved remains of ancient organisms
Term
artificial selection
Definition
selection by humans for breeding of useful traits from the natural variation among different organisms
Term
struggle for existance
Definition
members of each species compete regularly to obtain food, living space, and other necessities of life
Term
fitness
Definition
the ability of an individual to survive and reproduce in its specific environment
Term
adaptation
Definition
and inherited characteristic that increases an organisms chance of survival
Term
survival of the fittest
Definition
process by which individuals that are better suited to survive and reproduce most successfully do so (natural selection)
Term
descent with modification
Definition
principle that each living species has descended, with changes, from other species over time
Term
common descent
Definition
principle that all living things were derived from common ancestors
Term
homologous structures
Definition
structures that have different mature forms but develop from the same embryonic tissues
Term
vestigial organs
Definition
organ that serves no useful function in an organism
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