The Fe and Mn Cycles Include

question 36

Multiple Choice

The Fe and Mn cycles include

• A) reduced and oxidized forms that are very chemically reactive.
• B) large reservoirs of solid mineral forms that are chemically inert.
• C) incorporation of Fe and Mn into the exoskeletons of diatoms and other alga.
• D) toxic forms that can poison aquatic ecosystems if the cycles are imbalanced.

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