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science4-1

QuestionAnswer
Natural Selection theory proposed by Charles Darwin to explain how species change over time
Trilobite 3-sedment-bodied organism used as an index fossil
Organic Evolution theory that species have changed over time
Species groups o forganisms that normally reproduces only with other members of their own group
Eons longest geologic time unit; based on abundance of fossils
Period ime unit characterized by types of life existing world-wide at the time
Epoch shortest geologic time unit; based on difference in life forms that vary regionally, such as from continent to continent
Artifical Selection breeding of certain species by humans for desired traits
Era time unit based on major, striking and world-wide changes in types of fossils present
Geologic time lime/time line division of Earth's history into time units based on the types of life-forms that lived only during certain periods;consists of periods, epochs, eras, and eons
Example of Artifical Selection Runt
Created by: kmm0602
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