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davidjsb davidjsb
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10 years ago
What are some examples of convergent and divergent evolution, adaptive radiation and co-evolution? What implications will these examples have for future humans?
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10 years ago
"convergent -An example of convergent evolution is the similar nature of the wings of insects, birds, pterosaurs, and bats. All four serve the same function and are similar in structure, but each evolved independently and not from a common winged ancestor. The striking similarities between hummingbird moths and hummingbirds is another example of convergent evolution.




divergent- Divergent evolution is the accumulation of differences between groups which can lead to the formation of new species, usually a result of different groups of the same species adapting to different environments, leading to mutations. It can be seen in some higher-level characters of structure and function that are readily observable in organisms. For example, the vertebrate limb is one example of divergent evolution. The limb in many different species has a common origin, but has diverged somewhat in overall structure and function


adaptive -A classic example is the evolution of a fourth cusp in the mammalian tooth. This trait permits a vast increase in the range of foodstuffs which can be utilized, with species able to specialize on feeding on a range of foodstuffs. The trait arose a number of times in different groups during the Cenozoic, and in each instance was immediately followed by an adaptive radiation.[2] Birds find other ways to provide for each other, ie. the evolution of flight opened new avenues for evolution to explore, initiating an adaptive radiation.[3]



co-evolution - Examples of co-evolution include pollination of Angraecoid orchids by African moths. These species co-evolve because the moths are dependent on the flowers for nectar and the flowers are dependent on the moths to spread their pollen so they can reproduce. The evolutionary process has led to deep flowers and moths with long probosci."
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miamormiamor
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10 years ago
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