What are biogeochemical cycles?
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Is pollution always caused by humans?
What are the advantages of leguminous crop rotation in agriculture?
What are plankton, nekton, and benthos?
What is an ecosystem?
What are the main causes of the loss of the biological diversity nowadays?
Explain the role of the ozone layer for the living beings?
What is the primary energy source for life on earth?
Define selective waste collection?
Explain the tropic pyramids of ecology?
Explain how do populations of predators and preys vary in predatism?
What is harmonious ecological interaction?
How many tropic levels can a food chain have?