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Life Changes Over Time
Chapter 4 Vocabulary Terms-8th Grade
13
Science
8th Grade
01/06/2014

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Term
species
Definition
group of organisms that look alike and can reproduce among themselves
Term
evolution
Definition
process by which species change over time
Term
adaptation
Definition
trait that helps an organism survive in its environment
Term
mutation
Definition
change in a gene
Term
extinct
Definition
no longer found as a living species
Term
fossil
Definition
remains or traces of a once-living organism
Term
amber
Definition
hardened tree sap
Term
homologous structures
Definition
body parts that have the same basic structure
Term
vestigial structures
Definition
body parts that seem to have no function
Term
natural selection
Definition
survival of offspring that have favorable traits
Term
variation
Definition
differences in traits among individuals of a species
Term
extinction
Definition
disappearance of all members of a species
Term
anthropology
Definition
science that deals with the study of human beings
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