What is eutrophication?
What is a biome?
What is transgenic food?
What is the water cycle?
What is the primary energy source for life on earth?
How are grasslands classified?
What is inharmonious ecological interaction?
What is environmental resistance?
Is monoculture a system that contributes to great biological diversity of an ecosystem?
Why waste is considered one of the major environmental issues?
What are the three main types of tropic pyramids studied in Ecology?
What are primary consumers? Can food chain present quaternary consumers without having secondary or tertiary consumers? Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?
Which terrestrial vertebrate group is extremely rare in deserts?
In the ecological study of food interactions how are the autotrophic beings called?
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?