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Biology 11

Chapter 13

TermDefinition
evolution the process by which modern organisms have descended from ancient organisms
fitness the physical traits and behaviors that enable organisms to survive and reproduce in their environment
common descent idea that species have descended from common ancestors
adaptation any inherited characteristic that increases an organisms fitness for survival
fossils preserved remains of ancient organisms
geologic time scale record of the history of life determined by the positions of layers of rock
relative dating technique used to determine the age of fossils by comparing them with other fossils in different layers of rock
half-life length of time required for half of the radioactive atoms in a sample to decay
radioactive dating method of measuring rates of decay
Created by: AlishaKumar
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