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Tyler Bennett chap 7 vocab
chap 7 vocab science
12
Science
8th Grade
04/16/2014

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Term
adaptation
Definition
a charicteristic that helps a organism survive in its enviroment (150)
Term
species
Definition
the most specific of the sevan levals of classification; charicterized by a group of organisms that can mate to produce fertile offspring (150)
Term
evolution
Definition
the process by which populations acumilate inherited changes over time (151)
Term
fossil
Definition
the solidified remains or imprints of a ounce living organism (152)
Term
fossil record
Definition
a historical sequence of life indecated by fossils found in layers of the earths crust (152)
Term
vestigial structure
Definition
the remnant of a ounce-useful anatomical structure (153)
Term
trait
Definition
a distinquished quality that can be passed from one generation from anouther (160)
Term
selective breading
Definition
the breeding of organisms that have a certain desired trait (160)
Term
natural selection
Definition
the process by which organisms with faviorble traits survive and reproduce at a higher rate than organisms without the favorable trait (162)
Term
mutation
Definition
a change in the order of the bases in an organisms DNA; deletion, insertion, or substitution (163)
Term
generation time
Definition
the period between the birth of one generation and the birth of the next generation (164)
Term
speciation
Definition
the process by which two populations of the same species become so difrent that they can no longer interbreed (166)
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