Nutrients in excessive amounts enter water systems, causing algal bloom.

Nutrient pollution is caused when too many nutrients, primarily nitrogen and phosphorus, are added to water bodies. The excess nutrients act as fertilizers, causing excessive algae  growth. It is common for nutrients to run off the land in urban areas, where lawn and garden fertilizers are used.

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the correct answer is b. possesses the characteristic of compartmentalization of organelles, wherein the organelles are bound by membranes.

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answer: 45

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