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chapter 5
evolution
11
Science
7th Grade
02/28/2010

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Cards

Term
fossil
Definition
the remains or physical evidence of an organism preserved by geological process
Term
adaptation
Definition
a characteristic that improves an individuals ability to survive and reproduce in a particular environment.  
Term

species

 

Definition
a group of organisms that are closely related and can mate to produce offspring.
Term
evolution 
Definition
the process in which inherited characteristics within a population change over generations such that new species sometimes arise.
Term
fossil record
Definition
a historical sequence of life indicated by fossils found in layers of the earths crust.
Term
trait 
Definition
a genetically determined characteristic.
Term
selective breeding
Definition
the human practice of breeding animals or plants that have a certain desire characteristics.
Term
natural selection
Definition
the process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals.
Term
generation time
Definition
the period between the birth of one generation and the birth of the next generation.
Term
speciation
Definition
the formation of new species as a result of evolution.
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