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  • this guy is GOD!

    thesyrianhero 1 week ago

  • Thank you very much Dr. Phil

    RayRox17 1 month ago

  • thankyou!!

    PangNattamon 1 month ago

  • Comment removed

    bethwazzhere 1 month ago

  • Thanks for all your videos, our science teacher is giving an exam tommorow with these sectiosn in it - yoyur DNA replication was helpful too! Anyway, he did not teach it and it wasn't in a text book - you saved my life!!

    WileyNator 9 months ago

  • this helped me alot!! thank you so much!

    vlaikendvlainee 9 months ago

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