Biologymedium · Past Paper
Eutrophication in a lake is primarily caused by an excess of:
ACarbon and Hydrogen
BNitrogen and Phosphorus
COxygen and Sulfur
DCalcium and Magnesium
✓ Correct Answer: B — Nitrogen and Phosphorus
Nutrient enrichment (NPK) from fertilizers leads to algal blooms, which deplete oxygen in water bodies.
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