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Assessment
What is the primary source of energy for most freshwater ecosystems?
Sunlight
Nutrients from soil
Chemical reactions in water
Animal waste
Which organisms are typically found at the base of the food web in freshwater ecosystems?
Primary producers
Secondary consumers
Decomposers
Tertiary consumers
What is a significant impact of pollution on freshwater ecosystems?
Increased biodiversity
Decreased oxygen levels
Enhanced growth of aquatic plants
Improved water clarity
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