Which is the autotrophic group responsible for the production of most part of the molecular oxygen of earth?
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What is the typical conformation of the age pyramids of underdeveloped countries?
What is the zooplankton?
What are some examples of migratory animals?
Can the amount of available energy in a given tropic level to be larger than the available energy in inferior tropic levels? What does that condition means to the conformation of the energy pyramids?
Explain the role of the ozone layer for the living beings?
What is a food chain?
Can food chain present quaternary consumers without having secondary or tertiary consumers? Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?
Explain the main biological process that consumes carbon dioxide?
How are the grasslands of North America and of South America respectively called?
What is the carbon cycle?
Explain the primary energy source for life on earth?
Define biotic potential?