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Audience is Undergraduate upper division 15-16
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View Resource Aerial view of the upper Willamette River, Oregon.

Aerial view of the upper Willamette River, Oregon. Although some off-channel features and riparian forest remain, particularly in upper reaches as illustrated here, overall the Willamette River has...

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View Resource A sockeye salmon (Oncorhynchus nerka) in a small breeding stream in southwestern Alaska.

A sockeye salmon (Oncorhynchus nerka) in a small breeding stream in southwestern Alaska. Adult sockeye lay their eggs in the gravel of streams, rivers, or along the beaches of lakes in late summer...

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View Resource A periodical cicada (Magicicada sp.) molts on the side of a tree after emerging from underground.

A periodical cicada (left) has mostly freed itself from its old exoskeleton (right). The cicada's new exoskeleton is light in color and has not yet hardened. Every 13 or 17 years, periodical cicadas...

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View Resource A parsnip webworm (Depressaria pastinacella) feeds on wild parsnip (Pastinaca sativa) in the Netherlands.

A parsnip webworm (Depressaria pastinacella) feeds on wild parsnip (Pastinaca sativa) in the Netherlands. Both species are native to Europe and were introduced to North America, where they exist...

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View Resource A close-up view of Aloe vryheidensis flowers with dark-colored nectar visible.

Floral nectar is offered by plants to animals as a reward for pollination. Nectar is usually clear and contains sugar and trace amounts of amino acids. Colored nectar also occurs, but is less common....

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