What is the water cycle?
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What is eutrophication?
What is biodiversity?
Despite having a great biodiversity why, is the Amazon Rainforest under risk of desertification?
What are biomass pyramids? What do they represent?
Explain some examples of parasitism?
Define the nitrogen cycle?
What is a population?
Explain the mutualism?
What is the main biological process that consumes carbon dioxide?
Which terrestrial vertebrate group is extremely rare in deserts?
Explain how are the grasslands of north america and of south america respectively called?
Explain environmental resistance?