What is mutualism?
What is a food chain?
What do energy pyramids represent?
What is dry mass?
What is a biodigester?
Why is the sun the “motor” of the water cycle?
How can a great biological diversity protect an ecosystem from environmental damages? Why are less biodiverse ecosystems under the risk of suffering deep biological harms if submitted to even small changes?
What is Ecology?
How is carbon dioxide made by producers and consumers?
What are abiotic factors?
What is biotic potential?
What are autotrophic beings? What are heterotrophic beings?
What are species?
What are some examples of interspecif competition?
Is the upward move of the warm air good or bad for the dispersion of pollutants?