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ch. 13 practice
flash cards
| Question | Answer |
|---|---|
| Nitrifying bacteria | change nitrogen into forms that plants can take up their roots |
| nitrogen cycle | describes how nitrogen moves from the atmosphere to the soil, to living organisms, and then back to the atmosphere |
| phosphorus cycle | describes how phosphorus moves from soil to producers and consumers, and then back to soil |
| carbon cycle | describes how carbon moves between the living and non living environment |