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cxzCh. 7 Vocab~ Melina Fagg
Ch. 7 Vocab~ Melina Fagg
12
Science
8th Grade
04/16/2014

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Term

Adaption

Definition
A characteristic that helps an organism survive in its environment
Term

Species

Definition
The most specific of the seven levles of classification ; charaterized  by a group of organisms that can mat with each other to produce fertile offspring
Term

Evolution

Definition
The process by which populations accumukate inherited chnages over time
Term

Fossil

Definition
The solidified remains or imprints of a onceliving organism
Term

Fossil Record

Definition
Historical sequence of life indicated by fossils found in layers of the Earth's crust
Term

Vestigial Structures

Definition
The remnant of a one-useful anatomical structure
Term

Trait

Definition
Distinguishing quality that can be passed from one generation to another
Term

Selective Breeding

Definition
The breeding of organisms that have a certain desired trait
Term

Natural Selection

Definition
Process by which organisms with favorable traits survive and reproduce at a higher rate than organisms without favorable traits
Term

Mutation

Definition
Change  in the order of the bases in an organisms DNA; Deletion, Insertion, Substitution
Term

Generation Time

Definition
Time period between the birth of one generation and the birth of the next genertation
Term

Speciation

Definition
Process by which two populations of the same species become so different that they can no longer interbreed
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