What do energy pyramids represent?
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What is the respective importance of water for the living beings?
What are tropic levels? How many tropic levels can a food chain have?
How are ecological interactions classified?
Why the tropical forests are also known as stratified forests?
Define biosphere?
Under which form is nitrogen fixed by the living beings.
Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?
What are the typical vegetation and the typical fauna of the tropical forests?
Define transgenic food?
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?
What is a community?
What are the main chemical compounds that destroy the ozone layer?