What is biologic control?
What is the respective importance of nitrogen for the living beings?
How are the heterotrophic beings divided in the ecological study of food interactions?
How are ecological interactions classified?
Explain environmental resistance?
What is biosphere?
What are the main intraspecific ecological interactions?
What is the cost-benefit relation regarding sewage treatment as a strategy to fight water pollution?
Why transgenics are considered a threat to the environmental safety?
Why plutonium reprocessing is a big environmental issue?
Is monoculture a system that contributes to great biological diversity of an ecosystem?
What is commensalism?
What are species?
What is the main means by which autotrophic beings obtain energy?
What is the formula of the net primary production (npp)?