Explain the primary energy source for life on earth?
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Explain how does biological diversity relate to the characteristics of the abiotic factors of an ecosystem?
Explain some examples of migratory animals?
What is transgenic food?
What are heterotrophic beings?
What is the typical fauna of the tropical forests?
What is gpp?
Explain the primary energy source for life on earth?
Which is the autotrophic group responsible for the production of most part of the molecular oxygen of earth?
Explain water cycle?
Explain the analyses provided by the study of human age pyramids?
What is age pyramid?
Explain how do populations of predators and preys vary in predatism?