1.

Frequent occurrence of water blooms in a lake indicates

Answer»

NUTRIENT deficiency
Oxygen deficiency
EXCESSIVE nutrient availability
Absence of HERBIVORES in the lake

Solution :In polluted water nitrogen and phosphorus (from sewage) are accumulated which results in excessive growth of algae on water surface. Excessive growth of algae called water bloom. Due to death and decomposition of ORGANIC MATTER `O_2` not available to aquatic animals


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