What is the respective importance of water, carbon, and nitrogen for the living beings?
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Which type of ecological interaction is competition?
What are persistent organic pollutants (POPs?
What are the analyses provided by the study of human age pyramids?
Define ecology?
How do biodiversity, the total number of living beings, and the biomass respectively vary during the ecological succession?
What are some examples of interspecif competition?
What are the destinations of the organic material fabricated by the producers?
Explain the main characteristics of the age pyramids of developed countries?
Explain global warming?
Explain the parasitism?
Why transgenics are considered a threat to the environmental safety?
Define a food chain?