| 1-4 of 4Flashcard sets with a 'nitrogen cycle' term meaning 'the circulation of nitrogen in nature, bacteria is needed to convert nitrogen for most organisms to use' | |||
|---|---|---|---|
| # | Title | Terms | Date |
| 1 | ecologyby kenyangirl4036 | 35 terms | January 26, 2009 |
| 2 | Biology midterm reviewby kenyangirl4036 | 378 terms | January 26, 2009 |
| 3 | ecologyby paulinaVocabulary | 49 terms | December 18, 2008 |
| 4 | biology reviewby kenyangirl4036 | 378 terms | January 26, 2009 |