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Brayden Harris Ch 7 vocab
Brayden Harris Ch 7 life science vocal
12
Science
8th Grade
04/16/2014

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Term
Adaptation
Definition
A characteristic that helps an organism survive in its enviroment
Term
Species
Definition
The most specific of the seven levels of classification
Term
Evolution
Definition
The process by which populations accumulate inheirited changes over time
Term
Fossil
Definition
The solidified remains or imprints of a once living organisnm
Term
Fossil record
Definition
A historical sequence of life indicated by fossils found in layers of the earths crust
Term
Vestigal Structure
Definition
The remnant of a once- useful anatomical structure
Term
Trait
Definition
A distinguishing quality that can be passed from one generation to the next
Term
Selective Breeding
Definition
The breeding of organisms that have a certan desired trait
Term
Natural selection
Definition
The process by whiich organisms with favorable traits survive and reproduce at a higher rate than organisms without the favorable trait
Term
mutation
Definition
A change in the order of the bases in an organisms DNA
Term
Generation time
Definition
The period between the birth of one generation to the next
Term
speciation
Definition
The process by which 2 populations of the same species become so different that they can no longer interbreed
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