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AQA BIOL2 Biology Unit 2 Exam - 26th May 2011 watch

  • View Poll Results: Are you resitting this unit?
    YES!
    28.62%
    NO!
    71.38%

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    Sorry, this question might have been posted before, but is this a morning or afternoon exam?
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    Who has learnt the equation for standard deviation?
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    (Original post by ChessMister)
    Who has learnt the equation for standard deviation?
    We won't be asked to calcualate SD.
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    (Original post by EffKayy)
    We won't be asked to calcualate SD.
    How do you know that?
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    (Original post by ChessMister)
    How do you know that?
    specification.
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    What are 5 features of the capillaries that relate it to its function? (5)
    Answer in spoiler
    Spoiler:
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    Numerous and highly branched, so large surface area for diffusion (1) Narrow diameter, so they can permeate all tissues & no tissue is far from a capillary (2) Narrow lumen, so red blood cells are pushed up against the wall, making a short path for diffusion (3) Thin epithelium gives short path for diffusion (4) Holes in endothelium allow white blood cells to pass through to fight infections (5)
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    (Original post by GeorgieBoy)
    Sorry, this question might have been posted before, but is this a morning or afternoon exam?
    Afternoon
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    Does anyone know what sort of raw score we have to get to get full UMS in this paper in the past?

    Cheers.
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    (Original post by SmithytheDrummer)
    Does anyone know what sort of raw score we have to get to get full UMS in this paper in the past?

    Cheers.
    Yep, Here they are:

    June 09 = 67
    Jan 10 = 64
    June 10 = 73
    Jan 11 = 64
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    (Original post by sanaindaclub)
    Yep, Here they are:

    June 09 = 67
    Jan 10 = 64
    June 10 = 73
    Jan 11 = 64
    what's it out of?
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    (Original post by ChessMister)
    what's it out of?
    85
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    (Original post by sanaindaclub)
    100.
    It's out of 85.
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    (Original post by chemkid)
    It's out of 85.
    Oops! I was thinking of another exam.
    Thanks
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    (Original post by sanaindaclub)
    Oops! I was thinking of another exam.
    Thanks
    No worries
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    (Original post by sanaindaclub)
    Yep, Here they are:

    June 09 = 67
    Jan 10 = 64
    June 10 = 73
    Jan 11 = 64
    Thanks very much!
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    Guys, is the CGP enough for the Water Transport in Plant. Or am I gonna have to know it in more depth? :confused:
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    (Original post by Master.K)
    Guys, is the CGP enough for the Water Transport in Plant. Or am I gonna have to know it in more depth? :confused:
    u tell me lol
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    (Original post by LifeIsGood)
    Afternoon
    Thanks.
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    (Original post by Master.K)
    Guys, is the CGP enough for the Water Transport in Plant. Or am I gonna have to know it in more depth? :confused:
    tell me all you know about water transport and I will tell you if it is enough...
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    (Original post by kingsmod1)
    u tell me lol
    (Original post by ChessMister)
    tell me all you know about water transport and I will tell you if it is enough...
    Well this is what's in the CGP guide:

    The symplast pathway - goes through the living parts of the cells - the cytoplasm.
    The cytoplasm of neighbouring cells connect through plasmodesmata. (small gapps in the cell walls).

    The apoplast pathway - goes through the non living parts of the root - the cell walls.
    The walls are very absorbet and water can simply diffuse through them, as well as passing through the spaces between them.

    - When water in the apoplast pathway gets to the endodermis cells though, its path is blocked by a waxy strip in the cell walls, called the Casparian strip. Now the water has to take the synplast pathway.

    - This is useful, because it means the water has to go through the cell membrane.
    Cell membranes are able to control whether or not substances in water get through.

    - One past this barrier, the water moves into the xylem.

    Both pathways are used, but the main one is apoplast pathway because it provides the least resistance.

    (I just want to know if this is enough for the symplast/apoplast crap.) Thanks.
 
 
 
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