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    (Original post by shrey_15)
    i said they only tested 15 year olds so other ages may not drink alcohol
    you can also put that there was not 100% boys for any one of them and multiple of them could have the same boy drinking them
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    counting all of my marks i think i got 20 which isnt bad seeing as last year that was a C
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    (Original post by Nik123Efimov)
    Guys , I put a whole mark scheme together. If u want it send me a whatsapp or tweet me. +447712123002. Or @PlaysNik
    Btw check out #aqabiology
    👆👆
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    (Original post by SunnyBoys)
    This hasn't got much to do with this exam but why is a response from the brain quicker than the response through the spine. I automatically placed spine as the fastest response as when you have a reflex, it does not go to the brain but through the spine with the relay neurone (I know I was wrong but just want to understand why)
    I think it's one mark for one fewer synapse to cross (because the chemical bit is much slower than the electrical bit) and one mark for the fact that the neurons are much shorter (12cm in brain vs 80cm in spinal cord)

    (Original post by z_o_e)
    I wrote lichens.

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    Sadly not an animal
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    (Original post by saad.ash)
    hmm, PM it please
    On what ?
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    Is lichens wrong??


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    (Original post by SunnyBoys)
    This hasn't got much to do with this exam but why is a response from the brain quicker than the response through the spine. I automatically placed spine as the fastest response as when you have a reflex, it does not go to the brain but through the spine with the relay neurone (I know I was wrong but just want to understand why)
    cos brain doesnt use relay
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    For the GM mosquitoes pros and cons, I stated ethical positives as less people suffer and economical positives as less money is spent on treatment. Are these valid points for the advantages?
    Thanks
    Cirsium
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    (Original post by ammara-123)
    Is lichens wrong??


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    Think so. I wrote lichens.

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    (Original post by ammara-123)
    Is lichens wrong??
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    Yes, because lichens are not animals

    (Original post by haarithiop)
    cos brain doesnt use relay
    True, but that's given in the question so restating it won't get you the mark. You need to explain why that makes it faster - i.e. the synapse is the bit that slows it down.
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    (Original post by Cirsium)
    I think it's one mark for one fewer synapse to cross (because the chemical bit is much slower than the electrical bit) and one mark for the fact that the neurons are much shorter (12cm in brain vs 80cm in spinal cord)


    Sadly not an animal
    thats wrong. you cant say about length because question was talking about average distance travelled per second
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    (Original post by haarithiop)
    one mention of enzymes - for cutting out or putting in should be enough, only 3 marks

    1 mark for ) cut out gene
    2nd mark for) using enzymes
    3rd mark for) put in chromosome of other organism
    Hey I think the third mark would be for inserting it into the Dna of the other organism "at an early stage of development/as an embryo". That's what a mark scheme for similar question taught me anyway.
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    (Original post by Cirsium)
    Yes, because lichens are not animals


    True, but that's given in the question so restating it won't get you the mark. You need to explain why that makes it faster - i.e. the synapse is the bit that slows it down.
    i did write that lol. i just thought thats what he/she asked for
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    (Original post by ConfusedSnowball)
    Hey I think the third mark would be for inserting it into the Dna of the other organism "at an early stage of development/as an embryo". That's what a mark scheme for similar question taught me anyway.
    chromosomes made of dna, same thing
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    (Original post by z_o_e)
    Think so. I wrote lichens.

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    So did I!😭


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    (Original post by haarithiop)
    thats wrong. you cant say about length because question was talking about average distance travelled per second
    Hmm I guess you're right. I just can't figure out what the second marking point will be for then. Maybe one for saying that there'll be one fewer synapse and one for saying that the synapses are the slowest part of the arc?
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    (Original post by Cirsium)
    Hmm I guess you're right. I just can't figure out what the second marking point will be for then. Maybe one for saying that there'll be one fewer synapse and one for saying that the synapses are the slowest part of the arc?
    yep thats essentially what i put

    1) to pass through neurone an extra synapse has to be crossed
    2) synapse slower as chemical

    something like that
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    (Original post by charliej2802)
    Anyone else get 0.67%???
    It was 6.6?
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    (Original post by ammara-123)
    What was the malaria mean??


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    I got 0.6 recurring
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    Hey, guys can you send me the mark scheme for Chemistry paper on Thursday, please? cause I need to check my answers.
 
 
 
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