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What are the differences between the age pyramids of developed and under developed countries?
What is the gross primary production of an ecosystem? How does GPP relate to photosynthesis?
What is the role of the ozone layer for the living beings?
Define population?
What are tropic levels? How many tropic levels can a food chain have?
What is a community? What is the difference between the concepts of community and population?
Explain how are the grasslands of north america and of south america respectively called?
What are the environmental harms caused by mercury pollution? What are the main sources of mercury pollution?
What is the typical vegetation of the tropical forests?
Explain how can the abundance and diversity of living beings in the tropical forests be explained?
In the short range what will happen to the levels above and below a population of secondary consumers of a numeric pyramid if a large number of individuals from this population dies?
What is the formula of the net primary production?
What are some economic applications that can be generated by very biodiverse ecosystems?
What is the group of aquatic beings composed of large number of photosynthetic beings?
What is nuclear pollution?
