Biology > 2006 > 47
WASSCE
Which of the following orders correctly represents the trend in eutrophication?
A.
Lack of oxygen → Death of aquatic organisms → Massive algal growth
B.
Excess nitrates and phosphates → Massive algal growth → Lack of oxygen → Death of aquatic organisms
C.
Heavy mineralization → Lack of oxygen → Massive algal growth
D.
Excess nitrates and phosphates → Lack of oxygen → Massive algal growth → Death of aquatic organisms
Answer: B
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