How are the grasslands of North America and of South America respectively called?
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Define population density?
What is numeric pyramid? What does it represent?
What do numeric pyramids represent?
How many tropic levels can a food chain have?
Explain the predatism?
What is eutrophication?
What are the typical vegetation and the typical fauna of the deserts?
In the ecological study of food interactions how are the autotrophic beings called?
Define population?
Explain the main causes of the loss of the biological diversity nowadays?
How does gross primary production(gpp) relate to photosynthesis?
Is the upward move of the warm air good or bad for the dispersion of pollutants?