What is nekton?
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Explain the role of the ozone layer for the living beings?
Define ecosystem in your own language?
Is the upward move of the warm air good or bad for the dispersion of pollutants?
What are the differences between the age pyramids of developed and under developed countries?
Explain the major terrestrial biomes?
What is the typical conformation of the age pyramids of underdeveloped countries?
Can food chain present quaternary consumers without having secondary or tertiary consumers?
Explain water cycle?
What is numeric pyramid? What does it represent?
Explain nitrogen cycle?
Explain some examples of interspecif competition?
Explain why waste is considered one of the major environmental issues?