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BIOL4 Biology Unit 4 Exam - 13th June 2011 watch

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    what did people write for the question on the effects of leaching- 3 marks i think
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    (Original post by choc1234)
    im so confused
    what if you breed bbi and bbi - both will be chocolate but theres still a chance of producing cinnomen :s
    ahh! soo many silly mistakes
    i need an AAAAA!
    yeh but i never said breed 'bbi' and 'bbi' .... i said breed 'bb' and 'bb' OR 'bb' and 'bbi' ....
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    (Original post by choc1234)
    im so confused
    what if you breed bbi and bbi - both will be chocolate but theres still a chance of producing cinnomen :s
    ahh! soo many silly mistakes
    i need an AAAAA!
    I put bb, because if you had offspring it could have bi recessive... Then later in breeding, if another bi was present cinnamon offspring would be produced...

    EDIT: if you'd picked bbi
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    (Original post by lou12)
    what did people write for the question on the effects of leaching- 3 marks i think
    I wrote so much :/
    - eutrophication leads to increased nitrate conc
    - nitrate no longer limiting factor for algae who grow exponentially (algal bloom)
    -prevents light to lower layers, plants below die
    -oxygen concn decreases and fish + aerobic animals die
    -amount of anaerobic microorganisms increase + they produce toxic waste e.g. H2S
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    (Original post by lou12)
    what did people write for the question on the effects of leaching- 3 marks i think
    - soluble nitrates leached into nearby water sources (ponds, lakes)
    - nitrates stimulate growth of algae and cause algal bloom
    - blocks light to plants below so they cant photosynthesis and die
    - decomposers feed on the dead matter and use up oxygen for respiration
    - fish and other aquatic organisms cant respire and so die
    - anaerobic bacteria feed on dead matter and produce nitrates and toxic waste.
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    (Original post by lou12)
    what did people write for the question on the effects of leaching- 3 marks i think
    Algal bloom feed on fertiliser nutrients...
    Kills plants...
    Microorganisms decompose...
    Respire and use up O2 in water....
    Fish suffocate...
    Water uninhabitable
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    (Original post by SarahTM)
    I put bb, because if you had offspring it could have bi recessive... Then later in breeding, if another bi was present cinnamon offspring would be produced...

    EDIT: if you'd picked bbi
    but it didn't ask for 2nd generation did it? it just said that the breeder wanted to produce chocolate cats and having 'bb' and 'bbi' would do this. and so would 'bb' and 'bb'
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    (Original post by lou12)
    what did people write for the question on the effects of leaching- 3 marks i think
    i wrote the whole eutrophication stuff hehe
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    (Original post by SK-mar)
    but it didn't ask for 2nd generation did it? it just said that the breeder wanted to produce chocolate cats and having 'bb' and 'bbi' would do this as well as 'bb' and 'bb'
    No, I just assumed if he wanted all chocolate cats, he'd want them permenantly?
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    they didnt tell u to list out, they asked u effects of leaching

    so u put more anarboic produc wastes
    aerboic organisms dieing lack of oxygen etc.
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    (Original post by kingsmod1)
    they didnt tell u to list out, they asked u effects of leaching

    so u put more anarboic produc wastes
    aerboic organisms dieing lack of oxygen etc.
    but its better safe than sorry?
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    Yes, but all those things are a concequence...
    Plants dying due to inability to photosynthesise is a concequence...
    Increasing numbers of aerobic microorganisms is a concequence...
    Algal bloom is a concequence...
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    (Original post by SarahTM)
    No, I just assumed if he wanted all chocolate cats, he'd want them permenantly?
    yeh the ones he produces from those parent genotypes (bb and bb) or (bb and bbi) will be permanent won't they? they can't change fur colour during their life.

    if you use a punnet square with the genotypes 'bb' and 'bb' you get all all 'bb' offspring


    if you use a punnet square with genotypes 'bb' and 'bbi' you get 2 'bb' and 2'bbi' offspring.

    but even the bbi offspring are chocolate as 'b' is dominant over 'bi' ...



    edit: just kinda got what you mean. but yeh i dunno cos the question didn't specify that he wanted chocolate cats forever using the offspring .... anyway its a bit weird, its like the breeder would be condoning cat incest. lol.
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    (Original post by SK-mar)
    yeh the ones he produces from those parent genotypes (bb and bb) or (bb and bbi) will be permanent won't they? they can't change fur colour during their life.

    if you use a punnet square with the genotypes 'bb' and 'bb' you get all all 'bb' offspring


    if you use a punnet square with genotypes 'bb' and 'bbi' you get 2 'bb' and 2'bbi' offspring.

    but even the bbi offspring are chocolate as 'b' is dominant over 'bi' ...
    True, true. I assume both answers are fine
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    (Original post by SarahTM)
    True, true. I assume both answers are fine
    I edited my last post, sorry, read it now haha.
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    (Original post by SK-mar)
    I edited my last post, sorry, read it now haha.
    Haha :'D
    AQA promote interbreeding... That would be an interesting news headline :')
    Oh well. Cat fur is much more interesting than Dogwhelks :'D

    EDIT: Actually, it is condoned... And called Pedigree :'D
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    Hey guys I'm sitting this paper next year (in jan2011)
    Was this paper hard?
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    (Original post by SarahTM)
    Haha :'D
    AQA promote interbreeding... That would be an interesting news headline :')
    Oh well. Cat fur is much more interesting than Dogwhelks :'D

    EDIT: Actually, it is condoned... And called Pedigree :'D
    dogwhelks??????????/ wat there come from

    few of my friends missed the very Last Q at the back LOL about co2
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    (Original post by kingsmod1)
    dogwhelks??????????/ wat there come from

    few of my friends missed the very Last Q at the back LOL about co2
    Did you not do all the legacy papers? :'D
    Dogwhelks is a reccuring theme xD

    Ohmygod - gutted :O
    6 marks as well :')
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    (Original post by Rainbow249)
    1. For humans, I said they need it for many biological processes, such as mitosis and DNA replication, and they also require lots of ATP to maintain body temperature.

    2. I ticked all of photosynthesis (PSS), all of aerobic respiration and for anaerobic respiration, I only ticked that it makes ATP. But I was confused on the PSS one, because it does make ATP but that gets used up, so does it count? Mitochondria and Chloroplast are both organelles. Can't remember what the last row was for

    3. I put as one increases, the other decreases.

    4. The mites eat the pathogens so the chicks are less likely to catch a disease and die, so this increases breeding success.


    Does anyone agree with my points? If you disagree, tell me what you put instead please?
    There was a tick in every box for yours? I put a cross in production of ATP for pss, becuase net production was 0, also electron transport doesn't occur in either anaerobic respiration or photosynthesis.. Also, the mite question was horrible!!
 
 
 
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