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| 1. |
How do iron levels affect phytoplankton population in a marine ecosystem ?A. Without iron, eukaryotic phytoplankton population fall because they cannot convert atmospheric `N_(2)` to nitrogenous mineralsB. In the presence of too nuch iron, eukaryotic phytoplankton populations fall because they cannot convert atmospheric `N_(2)` to the nitrogenous mineralsC. Iron stimulates the growth of cyanobacteria, which converts atmospheric `N_(2)` to nitrogenous minerals , stimulating the growth of phytoplanktonD. Iron halts the growth of cyanobacteria, which converts atmospheric `N_(2)` to nitrogenous minerals. Therefore, phytoplankton population are limited |
| Answer» Correct Answer - C | |