Glossary
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Glossary Terms for letter: E
electron spin resonance dating An absolute dating method that uses microwave spectroscopy to measure electrons' spins in various materials.
empirical Verified through observation and experiment.
endemic Refers to a characteristic or feature that is natural to a given population or environment.
endogamous Refers to a population in which individuals breed only with other members of the population.
endotoxins Toxins released by bacteria when they break down or die.
Eoanthropus dawsoni The species name given to the cranium and mandible in the Piltdown hoax.
Eosimias A genus of very small basal anthropoids from the Eocene.
epiphyses The end portions of long bones; once they fuse to the diaphyses, the bones stop growing longer.
epochs Divisions of periods (which are the major divisions of eras) in geologic time.
equilibrium A condition in which the system is stable, balanced, and unchanging.
eras Major divisions of geologic time that are divided into periods and further subdivided into epochs.
essential amino acids Those amino acids that cannot be synthesized in the body; they must be supplied by the diet.
eukaryotes Multicelled organisms that have a membrane-bound nucleus containing both the genetic material and specialized organelles.
euprimates The first true primates from the Eocene: the tarsierlike omomyids and the lemurlike adapids.
evolutionary biology A specialty within the field of biology; the study of the process of change in organisms.
evolutionary synthesis A unified theory of evolution that combines genetics with natural selection.
exogamous Refers to a population in which individuals breed only with nonmembers of their population.
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