BI-1916
Energy losses in food chains
Biology · Secondary 4 · Medium · Energy losses in food chains
A farmer sprays fertiliser into a lake by accident. Over the next few weeks, many fish die. Which event directly causes the number of decomposers in the lake to increase?
- A decrease in dissolved oxygen in the water
- An increase in nitrate concentration in the water
- An increase in the population of algae
- An increase in the death of aquatic plants and algae
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