WAEC - Biology (2006 - No. 48)
Which of the following orders correctly represents the trend in eutrophication?
Lack of oxygen → Death of aquatic organisms → Massive algal growth
Excess nitrates and phosphates → Massive algal growth → Lack of oxygen → Death of aquatic organisms
Heavy mineralization → Lack of oxygen → Massive algal growth
Excess nitrates and phosphates → Lack of oxygen → Massive algal growth → Death of aquatic organisms