Relationships in an ecosystem, the interdependence of organisms in an ecosystem, including food webs.
How organisms affect, and are affected by, their environment, including the accumulation of toxic materials.
Describe how a species’ population changes as its predator or prey population changes.
Explain effects of environmental changes and toxic materials on a species’ population.
Combine food chains to form a food web.
Develop an argument about how toxic substances can accumulate in human food.
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