In a numeric pyramid to which tropic level does the base always refer?
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How is carbon dioxide made by producers and consumers?
Define a biodigester?
Explain the main factors that affect the growth of a population?
What are primary consumers? Can food chain present quaternary consumers without having secondary or tertiary consumers?
What are persistent organic pollutants (POPs?
What is the role of the ozone layer for the living beings?
Define mutualism?
Explain the typical vegetation and the typical fauna of the deserts?
Give an account of the classification of ecology?
What are some economic applications that can be generated by very biodiverse ecosystems?
How the biotic potential can be represented in the same graphic?
What is the cost-benefit relation regarding sewage treatment as a strategy to fight water pollution?