Why is it a big environmental issue?
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How does the vegetal stratification of an ecosystem influence the biological diversity?
What is dry mass?
What are primary consumers? Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?
What is the most abundant form of nitrogen in nature?
What is ecological succession?
Define commensalism?
Explain the difference between the concepts of food chain and food web?
Define selective waste collection?
What is numeric pyramid? What does it represent?
Why transgenics are considered a threat to the environmental safety?
What are the environmental harms caused by mercury pollution?
What do you mean by eutrophication?