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The process by which organisms change over time as a result of changes in heritable physical or behavioral traits. Changes that allow an organism to better adapt to its environment will help it survive and have more offspring.

***Darwin's book "On the Origin of Species" in 1859
https://www.livescience.com/474-controversy-evolution-works.html

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kingdom is a taxonomic rank that is composed of smaller groups called phyla.
http://www.biology-online.org/dictionary/Kingdom

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A domain is the highest level of organization.
***textbook page 20

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Taxonomic keys are useful tools for determining the identity of organisms.
***textbook page 22

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A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce.
***textbook page 18

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A genus is a classification grouping that contains similar, closely related organisms.
***textbook page 18

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The naming system Linnaeus used is called binomial nomenclature.
***textbook page 18

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The scientific study of how living things are classified.
***textbook page 17

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Classification is the process of grouping things together based on their similarities.
***textbook page 17