Explain nitrogen cycle?
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Is the upward move of the warm air good or bad for the dispersion of pollutants?
Explain the main characteristics of the age pyramids of developed countries?
What is the typical vegetation of the grasslands?
What is the main biological process that consumes carbon dioxide?
What is dry mass?
Define a food chain?
What is protocooperation?
Define pollution?
Is herbivorism a form of predatism?
What are the typical vegetation and the typical fauna of the tropical forests?
What is population density?
What do you mean by eutrophication?