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Deserts differ across the world. (a) Acacia trees between a gravel plain and sand dunes in the Namib
Convergence among tropical alpine plants: (a) Senecio trees on Mount Kilimanjaro, Africa
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
Mango trees
Presidential success under unified and divided government, from Eisenhower to trump
Binary fission, the reproductive mode of bacteria and archaea