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Chapter 26 - Chapter 26 Biodiversity Extinction and...

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Chapter 26- Biodiversity, Extinction, and Conservation Biological diversity has many components o Ecological diversity- adaptations that define an organism’s place in nature o Results from genetic change, or evolution o Genetic diversity- genetic variation crucial to the evolutionary responses of populations in order to change to the enviro o Phylogenetic diversity- takes into account the degree of relationship among organisms All species are related by evolutionary descent from common ancestors o Adaptive radiation- evolutionary convergence and the diversification of species descended from a recent common ancestor o Endemic species- species whose distributions are limited to small areas Oceanic islands o Endemism- regions with large numbers of endemic species are said to possess a high level of endemism Value of biodiversity o Species are disappearing at an alarming rate o Moral responsibility Because we affect it, we should fix it o Economic benefits Tourism
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