How are ecological interactions classified?
What are the main sources of mercury pollution?
Explain the main characteristics of the age pyramids of developed countries?
Define eutrophication?
Define a biome?
What are biotic factors?
Explain how does the vegetal stratification of an ecosystem influence the biological diversity?
What are autotrophic beings? What are heterotrophic beings?
Define carbon cycle?
Explain what is an example of intraspecific competition?
What is selective waste collection?
What is population density?
What is gpp? How is it related to photosysnthesis?
Define species?
Explain global warming?