What do you mean by eutrophication?
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What are primary consumers? Can food chain present quaternary consumers without having secondary or tertiary consumers? Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?
Define selective waste collection?
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 are the phytoplankton and the zooplankton?
Define a biodigester?
What is the respective importance of carbon for the living beings?
Define water cycle?
what are the difference between migration, emigration, and immigration?
What is competition?
Explain the main means by which autotrophic beings obtain energy?
What is the nitrogen cycle?
Define carbon cycle?