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History of Life_

AP Biology - History of Life on Earth Review

QuestionAnswer
A collection of abiotically produced molecules surrounded by a membrane or membrane-like structure. protobiont
An RNA molecule that functions as an enzyme, such as an intron that catalyzes its own removal during RNA splicing. ribozyme
A method for determining the absolute age of rocks and fossils, based on the half-life of radioactive isotopes. radiometric dating
The amount of time it takes for 50% of a sample of a radioactive isotope to decay half-life
The division of Earth's history into time periods, grouped into three eons—Archaean, Proterozoic, and Phanerozoic—and further subdivided into eras, periods, and epochs. geologic record
A process in which a unicellular organism (the “host”) engulfs another cell, which lives within the host cell and ultimately becomes an organelle in the host cell. See also endosymbiont theory. endosymbiosis
The elimination of a large number of species throughout Earth, the result of global environmental changes. mass extinction
Created by: jtaylor422
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