What are heterotrophic beings?
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Explain the main characteristics of the age pyramids of developed countries?
Which type of ecological interaction is competition?
How many tropic levels can a food chain have?
What do you mean by sustainable ecology?
What is a biodigester?
Explain how do the availability of water and light and the climate affect the growth of a population?
Explain nitrogen cycle?
What is biosphere?
What are some examples of migratory animals?
What are tropic levels?
Is the upward move of the warm air good or bad for the dispersion of pollutants?
What are the typical vegetation and the typical fauna of the tropical forests?