Biology Miller and Levine chapter 19

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Terms in this set (...)

extint
a species that has died out
paleontologist
reseachers who study fossils to learn about ancient life
Relative dating
it places rock layers and their fossils in a temporal sequence
Index fossils
distinct fossils used to establish and comparethe relative ages of rock layers and the fossils they contain
Radiometric dating
a way of dating fossils that relies on radioactive isotopes, which decay, or break down, into stable isotopes at a steady rate
half-life
the time required for half of the radioactive atoms in a sample to decay
geologic time scale
a time line of Earth's historyeras
plate tectonics
"solid plates" that move around
coevolution
the process by which two species evole in response to changes in each other over time
endosymbiotic theory
prokaryotic cells entered those ancestral eukaryotes

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