What is the difference between the concepts of food chain and food web?
What is the respective importance of carbon for the living beings?
Explain what is an example of intraspecific competition?
What is the respective importance of water for the living beings?
In a numeric pyramid, is it possible the base to be smaller than the other levels?
What are tropic levels? How many tropic levels can a food chain have?
What is the gross primary production of an ecosystem? How does GPP relate to photosynthesis?
How is gpp related to photosysnthesis?
What are the processes that autotrophic beings use to produce organic material from inorganic substances?
Explain the analyses provided by the study of human age pyramids?
What are tropic levels?
What are heterotrophic beings?
What is the cost-benefit relation regarding sewage treatment as a strategy to fight water pollution?
How does gross primary production(gpp) relate to photosynthesis?
How is carbon dioxide made by producers and consumers?
