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How are Dobzhansky and Mayr's ideas about the origin of species similar to Darwin’s?
They thought speciation is preceded by asexual reproduction.
They thought the evolution of new species is linked to environmental changes.
They focused on sympatric speciation.
They thought that subpopulations are new species.
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All of these ideas are similar to Darwin's in the sense that they all propose mechanisms for how new species arise through the process of evolution by natural selection. They all emphasize the role of environmental factors, genetic variation, and adaptation in driving the formation of new species.
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