what are the difference between migration, emigration, and immigration?
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Explain the parasitism?
What is the primary energy source for life on earth?
Define population growth rate?
What are the typical vegetation and the typical fauna of the tropical forests?
How does biological diversity relate to the characteristics of the abiotic factors of an ecosystem?
What are autotrophic beings?
What are the major terrestrial biomes?
Explain global warming?
What are abiotic factors?
How are the grasslands of North America and of South America respectively called?
Define ammensalim?
Define parasitism?