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Use your thinkfour account to access all Biology video tutorials for free. This includes our:

  • Studio Archive – video tutorials produced by education professionals in our thinkfour studio
  • Upload Archive – video tutorials made and uploaded by our users and then checked by our team

Below is a video tutorial from our Biology Studio Archive. Watch it to understand the science behind the isolation of species in Higher Biology (and why barriers can be good and bad).

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explore our subject library

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