Under which form is nitrogen fixed by the living beings.
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How many tropic levels can a food chain have?
Explain the main limitations for population growth
What is the difference between primary ecological succession and secondary ecological succession?
Can the amount of available energy in a given tropic level to be larger than the available energy in inferior tropic levels? What does that condition means to the conformation of the energy pyramids?
How do biodiversity, the total number of living beings, and the biomass respectively vary during the ecological succession?
What is a population?
What is parasitism?
What is the formula of the net primary production (npp)?
What are some examples of interspecif competition?
Explain the parasitism?
Why transgenics are considered a threat to the environmental safety?
What are tropic levels? How many tropic levels can a food chain have?