Does thermal inversion occur in the winter or in the summer?
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Define parasitism?
Define commensalism?
Define a biodigester?
What is the respective importance of nitrogen for the living beings?
How can a great biological diversity protect an ecosystem from environmental damages?
What do biomass pyramids represent?
Explain what is the most abundant form under which nitrogen is found in nature?
What is the respective importance of water for the living beings?
Is pollution always caused by humans?
What are the main characteristics of the age pyramids of developed countries?
Explain the main intraspecific ecological interactions?
What is environmental resistance?