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OCR Biology F212 Revision [3rd June 2013] (Now Closed) Watch

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    (Original post by ThePremierLeague)
    hi for 2 marks how do you define 'biodiversity'

    thanks
    You've probably got an answer already, but!?
    - The variety of living organisms/life (1)
    - [...], within and between habitats/species/ecosystems (1).


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    I have typed up every single question asked in every past paper except Jan 2013 which the mark scheme answer under it so if anyone wants it just give me a PM with your email and I'll send you them!
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    (Original post by lauren1brown)
    I've literally just finished all the content! Past papers tomorrow


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    Ahh ok, I've got DNA and the smoking section left to do! I haven't done any past papers yet, so I'm hoping to do them tomorrow... Definitely going into the exam with a panic attack! But good luck to you


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    (Original post by Ché.)
    Ya!
    Little sections here and there...
    Not much though; past papers are pending tonight and tomorrow...

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    Ahh ok, we'll done! Good luck! I'm doing past papers tomorrow too


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    Any general predictions?
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    Can someone explain variation to me, both continuous, discontinuous along with genetic and environmental
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    (Original post by OHK567)
    Can someone explain variation to me, both continuous, discontinuous along with genetic and environmental
    Discontinuous variation:
    Influenced by few genes
    Qualitative
    No (or few) intermediates between two extremes
    Small environmental effects
    Continuous variation:
    Influenced by many genes
    Quantitative
    Has a range of values between two extremes
    No defined categories

    Someone else can do the genetic and environmental
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    (Original post by OHK567)
    Can someone explain variation to me, both continuous, discontinuous along with genetic and environmental
    Continuous it like height.
    Discontinuous is like age, only 2 possibilities.
    Genetic is like what you get from your parents, I.e. height if they are tall you probably will be.
    Environmental is like in the 1800 people were shorter as they were more malnourished than we are now so we are taller as we have more energy for growth etc
    Hopefully that's brief but concise
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    (Original post by own)
    Continuous it like height.
    Discontinuous is like age, only 2 possibilities.
    Genetic is like what you get from your parents, I.e. height if they are tall you probably will be.
    Environmental is like in the 1800 people were shorter as they were more malnourished than we are now so we are taller as we have more energy for growth etc
    Hopefully that's brief but concise
    Thank you
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    (Original post by Gotzz)
    Discontinuous variation:
    Influenced by few genes
    Qualitative
    No (or few) intermediates between two extremes
    Small environmental effects
    Continuous variation:
    Influenced by many genes
    Quantitative
    Has a range of values between two extremes
    No defined categories

    Someone else can do the genetic and environmental
    Cheers understand pretty much everything now do u need any help??
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    (Original post by Smuu)
    Ahh ok, we'll done! Good luck! I'm doing past papers tomorrow too


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    Thank you!
    Have you done a past paper before!?


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    (Original post by Gotzz)
    So any predictions?
    Revising atm, but since COPD came up in the last exam I think it's highly unlikely it will come up on monday's exam.

    The three units are separated by blue, red and black; making "predicting" a bit easier.

    The simpson's index came up in both the Jan 2010 and Jun 2010 exams, it hasn't appeared in the 4 exams after that (not sure if resits are included) so I think it might show up...
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    (Original post by kimsiclez)
    This is great, thank you! What do the different colours mean?
    No worries, glad I could help!

    Red = Biological molecules
    Blue = Food and health
    Black = Biodiversity
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    I have a question. Is antigen a name of a receptor for pathogens? Or is receptor and antigen a completly different thing?

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    (Original post by wndms)
    I have a question. Is antigen a name of a receptor for pathogens? Or is receptor and antigen a completly different thing?

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    Antigen: A substance that causes the immune system to produce antibodies.

    They will be found on the membranes of pathogens.

    Receptor: Something that can detect chemicals, usually found on cell membranes.

    http://asbiology101.files.wordpress....e-response.pdf
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    anyone need any help?
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    Hey guys, anyone got some notes I could use that cover the material for the exam?
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    got any questions on topics?
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    I'm gonna need to cover the whole unit in a day.
    Quite a tall order :confused:
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    (Original post by Nas.)
    Hey guys, anyone got some notes I could use that cover the material for the exam?
    These are notes posted by lexafish on f212 specification. http://www.thestudentroom.co.uk/show....php?t=1296764
 
 
 
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