endangered species   10 videos

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  Endangered Species

  Biology Conservation Biology

  Definition and examples of endangered species.

  endangered species extinct threatened vulnerable
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  Keystone Species

  Biology Communities and Ecosystems

  An explanation of keystone species.

  keystone species
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  Speciation

  Biology Evolution

  How species are formed.

  speciation allopatric sympatric species
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  Divergent Evolution

  Biology Evolution

  How related species diverge.

  divergent evolution
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  Adaptive Radiation

  Biology Evolution

  The fast evolution of species with a common ancestor.

  adaptive variation
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  Convergent Evolution

  Biology Evolution

  How unrelated species acquire similar traits.

  convergent evolution
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  Coevolution

  Biology Evolution

  How species influence each other's evolution.

  coevolution
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  Reproductive Isolation - Prezygotic - Postzygotic

  Biology Evolution

  How reproductive isolation keeps species distinct.

  reproductive isolation prezygotic postzygotic
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  Classification Overview

  Biology Classification

  An overview of Biology classification systems.

  classification kingdom phylum class order family genus species domain
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  Evolution

  AP Biology AP Biology Videos

  Natural selection evidence of evolution patterns species and reproductive isolation