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← ScienceWhich characteristic shifts when dissolved iron concentration limits algae growth?
A)Rate of oxygen production decreases✓
B)Phosphorus uptake efficiency increases
C)Nitrogen depletion becomes less apparent
D)Silicate solubility limit extends further
💡 Explanation
The limitation on iron down-regulates photosynthetic activity, therefore algal oxygen production drastically slows because electron transport processes associated with the Calvin cycle are now constrained, rather than phosphorus changing or nitrogen depletion becoming less apparent under fixed limitations.
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