What is biosphere?
How are the grasslands of North America and of South America respectively called?
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?