What is the most abundant form of nitrogen in nature?
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Define dry mass?
Define biosphere?
What is competition?
Explain the main characteristics of the age pyramids of developed countries?
What are colonies and societies?
Which terrestrial vertebrate group is extremely rare in deserts?
Define pollution?
What is the difference between the concepts of community and population?
Explain the role of the ozone layer for the living beings?
What are the three main types of tropic pyramids studied in Ecology?
Define biologic control?
What are primary consumers? Can food chain present quaternary consumers without having secondary or tertiary consumers?