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Terms in this set (15)
a group of similar organisms that can mate to produce fertile offspring
the preserved remains or traces of an organism that lived in the past.
a trait that helps an organism survive and reproduce.
a gradual change in a species over time.
process by which individuals that are better adapted to their environment are more likely to reproduce.
any difference between individuals of the same species
producing more offspring than can survive.
a common demand by two or more organisms for a limited supply of food, water or mates.
breeding organisms with specific traits in order to produce offspring with identical traits.
showing many different types or forms
similar structure in related species that has been inherited from a common ancestor
diagram that shows how scientists think different groups of organisms are related
the millions of fossils that scientists have collected
Geologic Time Scale
the calendar of Earth's history
a species that does not have any living members
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