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Assessment
What is the primary role of phytoplankton in aquatic ecosystems?
To produce oxygen through photosynthesis
To decompose organic matter
To serve as predators to larger fish
To provide habitat for aquatic organisms
Which of the following is a major threat to aquatic ecosystems?
Overfishing
Rainfall
Riparian vegetation
Natural sedimentation
Eutrophication in aquatic environments is primarily caused by:
Excessive nutrients from agricultural runoff
Increased carbon dioxide levels
Low concentrations of oxygen
Natural predator-prey dynamics
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