Evidence by Example

Although the history of life is always in the past, there are many ways we can look at present-day organisms, as well as recent history, to better understand what has occurred through deep time. Artificial selection in agriculture or laboratories provides a model for natural selection. Looking at interactions of organisms in ecosystems helps us to understand how populations adapt over time. Experiments demonstrate selection and adaptive advantage. And we can see nested hierarchies in taxonomies based on common descent.

Checking dataChecking wheat for aluminum toleranceComputers in the dairy industry

  Photo of researcher courtesy of Sandra Velleman, The Ohio State University.
Greenhouse image courtesy of the USDA, Agricultural Research Service.
Dairy image courtesy of Dr. Normand St-Pierre, The Ohio State University.
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