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    whats the difference between natural selection and genetic drift?
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    Does Jaden Smith set some of these F215 questions?


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    Guys whats the difference between adrenaline and noradrenaline in the fight and flight response?
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    Can someone list the things we need to know to answer

    "Discuss how the links between a range of human behaviours and the dopamine receptor DRD4 may contribute to the understanding of human behaviour"


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    (Original post by Beni24)
    whats the difference between natural selection and genetic drift?
    Genetic drift:
    Greater effect on smaller populations as chance has a greater influence
    Organisms likelihood of survival is purely due to chance

    Natural selection:
    Characteristics become more common if they increase an organisms likelihood of survival.
    Usually work in large populations as chance factors tend to even out.
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    What do I need to know about Dopamine? My textbook and revision guides are pretty vague
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    any predictions?
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    (Original post by Beni24)
    Guys whats the difference between adrenaline and noradrenaline in the fight and flight response?
    I think they're essentially the same thing. Adrenaline may be the breakdown of noradrenaline
    I'm not sure which one OCR prefers :/
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    can someone outline the steps involved in sequencing the genome of an organism - don't understand the way the textbook explains it and what I specifically need to know.

    thanx
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    do we need to know the names of the antibody chemicals used on genetically engineered human insulin?
    so ampicillin and tetracycline
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    (Original post by LucyAJ)
    What do I need to know about Dopamine? My textbook and revision guides are pretty vague
    Here's all I know (if I've missed something important out let me know
    Its a neurotransmitter
    Affect mood mainly make people more outgoing
    5 different receptors
    Dopanine can have different effects it depends on which receptor it binds to
    Having too much D4 can link to abnormal behaviour, can affect memory and emotions.
    Evidence
    Drugs that stimulate dopamine receptors given to healthy people cause behaviour seen in schizophrenia
    Drugs that block receptors for dopamine reduce symptoms of schizophrenia
    People with schizophrenia have a higher density of D4 receptors in the brain. Having more D4 receptors means its more likely that dopamine will bind to these receptors and trigger a response.
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    (Original post by lyd.maddox)
    do we need to know the names of the antibody chemicals used on genetically engineered human insulin?
    so ampicillin and tetracycline
    yes
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    Guys do you think the hardy-Weinberg principle will come up again this year because a lot of people struggled with it last year?


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    whats the hardest paper? jan 2011?
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    (Original post by cinderella25)
    Guys do you think the hardy-Weinberg principle will come up again this year because a lot of people struggled with it last year?


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    Nah, i think chi-squared will come up instead

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    (Original post by cinderella25)
    Guys do you think the hardy-Weinberg principle will come up again this year because a lot of people struggled with it last year?


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    considering how ****ed up the exam board is you never know.
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    (Original post by Alltimesarah)
    Here's all I know (if I've missed something important out let me know
    Its a neurotransmitter
    Affect mood mainly make people more outgoing
    5 different receptors
    Dopanine can have different effects it depends on which receptor it binds to
    Having too much D4 can link to abnormal behaviour, can affect memory and emotions.
    Evidence
    Drugs that stimulate dopamine receptors given to healthy people cause behaviour seen in schizophrenia
    Drugs that block receptors for dopamine reduce symptoms of schizophrenia
    People with schizophrenia have a higher density of D4 receptors in the brain. Having more D4 receptors means its more likely that dopamine will bind to these receptors and trigger a response.
    You absolute star thank you!!! 🌟🌟🌟
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    Can someone outline how to genetical engineer insulin please? and for golden rice
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    (Original post by doctor_2_be)
    considering how ****ed up the exam board is you never know.
    Just in case I have revised for it and now I am hoping it will come up haha.


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    (Original post by Prince edmund)
    Nah, i think chi-squared will come up instead

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    Yeah I revised that too. But just in case I also revised hardy-Weinberg and I hope it will come up too haha


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