Define ecosystem in your own language?
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What are persistent organic pollutants?
Is herbivorism a form of predatism?
Define environmental resistance?
How is carbon dioxide made by producers and consumers?
What is the difference between the concepts of community and population?
What are primary consumers? Can food chain present quaternary consumers without having secondary or tertiary consumers? Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?
What is commensalism?
Explain how are the grasslands of north america and of south america respectively called?
Which is the autotrophic group responsible for the production of most part of the molecular oxygen of earth?
Define population density?
How can a great biological diversity protect an ecosystem from environmental damages?
What is the role of the pioneer species?