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    Describe that data can be extrapolated to make predictions, that these are used in models of future global warming, and that these models have limitations. (spec point 19)

    Anyone?
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    (Original post by anaab.naeem)
    Looking at the past few papers, me and my friend came up with what we think will come in the paper tomorrow as:
    -TB
    -Photosynthesis
    -Non-specific response
    -Possible Gel electrophoresis
    -Succession
    -Speciation
    -Abiotic and Biotic factors
    Non-specific came up spread over a few questions about histamine and introns in January
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    Is anyone struggling with the time?
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    anyone with the pdf file for cgp rev guide???
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    i am slightly confused here... Are the introns in the post-transcriptional process removed or spliced? and are exons spliced as well? i thought splicing means joining them together.
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    (Original post by Sravya)
    CGP book and do all of the past papers again!
    The cgp guide doesnt have anything about lymphocytes
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    (Original post by MarshmallowBob)
    Is anyone struggling with the time?
    Yes. I haven't done as much as I would have like to and time certainly is limited.
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    (Original post by bubblegummer)
    i am slightly confused here... Are the introns in the post-transcriptional process removed or spliced? and are exons spliced as well? i thought splicing means joining them together.
    Isnt splicing the process by which the introns are removed, and the exons are joined to from an mRNA strand?
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    Can someone possibly tell me all the differences between specific and non spec response in immunity? Please and thanks in advance
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    (Original post by MarshmallowBob)
    The cgp guide doesnt have anything about lymphocytes
    What do we need to know about lymphocytes?
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    what are the limitations to the models of future global warming?
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    (Original post by nukethemaly)
    Describe that data can be extrapolated to make predictions, that these are used in models of future global warming, and that these models have limitations. (spec point 19)

    Anyone?
    (Original post by Sravya)
    what are the limitations to the models of future global warming?
    - It's still not possible to tell the exact impact of CO2 on global warming
    - We can't predict the effect of global warming on other aspects of climate (rainfall patterns, air currents etc)
    - Extrapolations from past data do not take into account unknown factors in the future.

    [See page 48 of the A2 student book, title "Predicting the future"]
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    (Original post by Sravya)
    what are the limitations to the models of future global warming?
    1. data is limited2, not really understood how the climate system works 3, limited computer resources4. not all factors involved in climate change are included 5. some factors are changing faster or less than expected
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    guys what calculations do we have to know for NPP?
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    (Original post by Sravya)
    what are the limitations to the models of future global warming?
    Im not 100% sure but i think these points might help:
    your dealing with extrapolated data therefore its not reliable
    you dotn know how much of the increase in temperature is due to CO2/CH4, and how much of it is due to natural causes
    steps maybe taken to prevent global warming, which may or may not be successful
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    (Original post by raves)
    guys what calculations do we have to know for NPP?
    NPP=GPP - Repiration
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    What do we need to know about the carbon cycle?
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    (Original post by Sravya)
    What do we need to know about lymphocytes?
    The last question in jan 2012 about AIDS had alot to do with lymphocytes.
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    can someone help me with june 2010 Q2 b)ii) pleaaaasee
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    Does carbon fixation mean using co2 to produce organic products or am I wrong?
 
 
 
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