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Abigail Miller #26
Chap. 7
12
Science
8th Grade
04/16/2014

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Term
Adaption
Definition
A charachteristic that helps an organism survive in its enviroment.
Term
Species
Definition
The most specific of the seven levels of classification; charachterized by a group of organisms that can mate with one another to produce fertile offspring.
Term
Evolution
Definition
The process by which populations accumalate inherited changes over time.
Term
Fossil
Definition
The solidified remains or imprints of a once living organism.
Term
Fossil Record
Definition
A historical sequence of life indicated by fossils found in layers of the earths crust.
Term
Vestigial 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 certain desired traits.
Term
Natural Selection
Definition
The process by which organisms with favorable traits survive and reproduce at higher rate than organisms without the favrable trait.
Term
Mutation
Definition
A change in the order of the bases in an organisms' DNA deltion substitution or insertion
Term
Generation Time
Definition
The period between he birth of one generation and the birth of the next.
Term
Speciation
Definition
The process by which two populations of the same species become so different that they can no longer interbreed.
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