What is the water cycle?
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What is ammensalim?
What are tropic levels? How many tropic levels can a food chain have?
What is the main means by which autotrophic beings obtain energy?
Explain the main biological process that consumes carbon dioxide?
Define transgenic food?
How does gross primary production(gpp) relate to photosynthesis?
What is the carbon cycle?
Explain the main types of waste?
What is the nitrogen cycle?
What is the typical fauna of the tropical forests?
What is environmental resistance?
What is the difference between the concepts of community and population?