Biology, 14.12.2020 18:00 christson805
7. Which statement is correct?
1. Nitrogen must cycle through an ecosystem because it is used to make
proteins and nucleic acids.
2. Nitrogen makes up most of Earth's atmosphere.
3. Nitrogen gas from the atmosphere cannot be used by plants to make organic
compounds.
4. all of the above
Answers: 3
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7. Which statement is correct?
1. Nitrogen must cycle through an ecosystem because it is used to ma...
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