Uploaded February 2015 | Updated September 2026, 1 week ago

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This video explains how nitrogenous gas makes up 80% of the atmosphere and most nitrogen enters into the ecosystem via nitrogen-fixing bacteria, but many organisms still struggle with nitrogen availability because they cannot use it in that form. Watch more sample problem videos about the Nitrogen Cylce, in which expert teachers show step-by-step solutions to all types of problems, at brightstorm.com/science/biology/communities-and-ecosystems

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