Define mutualism?
Explain the main limitations for population growth
Explain some examples of parasitism?
How does net primary production relate to the energy pyramids?
Under which form is nitrogen fixed by the living beings.
What are abiotic factors?
What does numeric pyramid represent?
What are primary consumers? Can food chain present quaternary consumers without having secondary or tertiary consumers?
Define ecological succession?
What is the role of the pioneer species?
What are pioneer species?
What are the phytoplankton and the zooplankton?
What is biologic control?
Explain the main types of waste?
What is selective waste collection?