What are biogeochemical cycles?
In the ecological study of food interactions how are the autotrophic beings called?
How is gpp related to photosysnthesis?
Define water cycle?
What are the typical vegetation and the typical fauna of the taigas?
Explain the mutualism?
What does numeric pyramid represent?
Define a biome?
In a numeric pyramid, is it possible the base to be smaller than the other levels?
How are the grasslands of North America and of South America respectively called?
Explain water cycle?
What are biotic factors?
Which is the autotrophic group responsible for the production of most part of the molecular oxygen of earth?
What is population?
Explain the role of the ozone layer for the living beings?