What is age pyramid?
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What is the cost-benefit relation regarding sewage treatment as a strategy to fight water pollution?
Define population growth rate?
What is parasitism?
Define nuclear pollution?
Into which type of energy is the light used in photosynthesis transformed.
Explain the main chemical compounds that destroy the ozone layer?
Explain what is the most abundant form under which nitrogen is found in nature?
What is a community?
What is the carbon cycle?
What are the main causes of the loss of the biological diversity nowadays?
Explain the typical conformation of the age pyramids of underdeveloped countries?
What is a biome?