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    (Original post by hermiones)
    SMALL SCALE
    Coppicing - cutting a tree close to the ground to encourage new growth, whilst keeping it alive - sustainable. It regrows new shoots over and over to be used

    Pollarding - similar to coppicing, but higher up on the tree eg, branches - used when there are lots of deer as the deer eat the growing shoots from coppiced trees so it takes a while to grow back (when it's cut higher they can't reach it)

    ROTATIONAL coppicing - dividing woodland into sections and only cutting from that section once a year, until they've all been cut - this means that the ones from the beginning are ready to be cut again as they've left them to grow. Good for biodiversity - different woodland areas provide different habitats (different amounts of light in woodland in diff areas), so biodiversity is larger


    LARGER SCALE
    Selective cutting - removing only largest, most valuable trees so habitat isn't affected much

    Clear-felling - cutting down ALL the trees in one area at one time - rare in UK, leaves soil susceptible to erosion, soil can run off into waterways and pollute them because there are no trees to protect
    Maaate thanks! Sorry, out of reps!
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    (Original post by ChoccyPhilly)
    I do not understand why this isn't in my book in the slightest
    It depends on the book, I have 4 different ones, the best one is Heinemann but I got that from 'myrevisionnotes' booklet, with a lizard on it. It's pretty good but may be too late to buy it hahaha. The normal green OCR one with the lizard's eye on it is BULL**** it is so bad
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    (Original post by bakedbeans247)
    Timber management guys? Could someone simplify it into bullet points for me please? I would be soo grateful!! Cheers!
    Conservation:

    Sustainable management: finding a balance between our needs and away to not damage the environment

    Small Scale Timber Production:
    • Coppicing: harvesting wood whilst keeping tree's alive
    • Cutting trunk of decidous tree's a little higher than the ground
    • shoots grow
    • Pollarding, similar tactic but the trunk is cut higher to prevent shoots being eaten by animals.
    • Rotational Coppicing
    • Sectioning tree's into groups
    • some cut, some aren't
    • Cut tree's grow back in time for other tree's to be cut.
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    (Original post by bakedbeans247)
    Maaate thanks! Sorry, out of reps!
    No probs, I only joined today anyway so I have no idea what that is hahaha. Good luck for tomorrow :-)
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    NEW CHAT PAGE IS https://chatstep.com/#bio_f215 we are going over stuff...why not try lol
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    should be red, vermillion and cinnabar. because V has to be dominant for it to even be any of the other two, also if the middle one isn't dominant therefore even if the third is dominant, it will be limited to the second.
    Just going along with the arrows really, if it's not dominant it cannot be any of the further down the line.
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    (Original post by Shostakovish)
    That link looks a little dodgy......
    trust me it isn't. there is like 10 people now...trying to get more
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    what's hybridisation?


    Posted from TSR Mobile
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    for all you guys pulling all nighters like me
    http://fixyourwritinghabits.tumblr.c...vely-and-still
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    Hello guys can someone tell me how they got the answer of 22 and 1 for question 3. (c). (i.)

    Thank you.

    http://www.ocr.org.uk/Images/65359-q...nvironment.pdf

    p.s. Mark schemes should at least include how they work it out you know =.=
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    anyone else have the green ocr cgp textbook?
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    any predictions please anyone? so desperate
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    can someone please give me a perfect answer for : ''Why is variation important in natural selection''
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    I have the CGP book, but as well as the Heinemanne - I use the CGP to simplify things, like epistasis
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    (Original post by YouAgain)
    Hello guys can someone tell me how they got the answer of 22 and 1 for question 3. (c). (i.)

    Thank you.

    http://www.ocr.org.uk/Images/65359-q...nvironment.pdf

    p.s. Mark schemes should at least include how they work it out you know =.=
    its just absorbed - respired fam
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    (Original post by YouAgain)
    Hello guys can someone tell me how they got the answer of 22 and 1 for question 3. (c). (i.)

    Thank you.

    http://www.ocr.org.uk/Images/65359-q...nvironment.pdf

    p.s. Mark schemes should at least include how they work it out you know =.=
    It is the absorbed - respired
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    ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhh!
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    (Original post by ecwsky)
    ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhh!
    stressed?
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    Hi!

    In primary metabolite production, why does the amount of product decrease as the population size of bacteria decreases in the death phase? Shouldn't the amount of product level off, since it's the bacteria that's dying - so how does the product get affected?

    I'm referring to the top graph on pg 161 of the purple OCR A2 biology book, if you have it.

    Thanks.
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    so can someone outline electrophoresis in bullet points and DNA sequencing
 
 
 
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