Final answer:
Tropical rainforests exhibit the highest species diversity among biomes due to unique factors and evolutionary history.
Explanation:
Tropical rainforests have the greatest species diversity among biomes due to various factors such as climate and geographical history, containing over half of the world's species despite covering only 7% of the Earth's land surface. This high biodiversity is attributed to unique assemblages of species that have evolved in isolation in areas like South and Central America, Africa, Asia, and Australia.
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