Define a population?
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What is ammensalim?
Explain nitrogen cycle?
What is the formula of the net primary production?
What is the typical vegetation of the grasslands?
How is energy transferred along a food chain?
Why does this field interest you?
Why is leguminous crop rotation used in agriculture?
What are societies?
What do biomass pyramids represent?
Explain how does the vegetal stratification of an ecosystem influence the biological diversity?
Explain the typical conformation of the age pyramids of underdeveloped countries?
What is the difference between the concepts of community and population?