Hey there! Sign in to join this conversationNew here? Join for free
    Offline

    13
    ReputationRep:
    It said like it was in the figure above, surely, you can't label something that you haven't drawn, it just doesn't happen.
    Offline

    2
    ReputationRep:
    (Original post by CIEBioloysifh)
    It wouldn't mean just label an empty section, you probably needed to drawn the outline of the xylem vessel as it said identify on your diagram I think.
    You had to label the section only, drawing of individual xylem cells will be penalised
    Offline

    2
    ReputationRep:
    (Original post by CIEBioloysifh)
    Maybe 2 or 3?
    Why did u make the edges so jagged
    Offline

    13
    ReputationRep:
    I drew the outline of the xylem vessel, if you just pointed it to a place in the vascular bundle surely you would lose the mark because you are not pointing anywhere.
    Offline

    13
    ReputationRep:
    (Original post by examhater44)
    Why did u make the edges so jagged
    True, they were curved and have in bits and out bits; but weren't jagged.
    Offline

    1
    ReputationRep:
    Was I correct in assuming that for the "red dye" question you had to place a plant in a beaker filled with the solution? Not just cut a piece then stain it?
    Offline

    11
    ReputationRep:
    (Original post by juannypacquiao)
    Was I correct in assuming that for the "red dye" question you had to place a plant in a beaker filled with the solution? Not just cut a piece then stain it?
    It said it could be seen with a microscope so I assumed you had to prepare the microscope and could cut a piece and stain it??
    Offline

    1
    ReputationRep:
    (Original post by 123Master321)
    It said it could be seen with a microscope so I assumed you had to prepare the microscope and could cut a piece and stain it??
    I initially placed the plant in the solution so it would rise up the xylem then I would cut it and place it under the microscope. Is that still correct?
    Offline

    11
    ReputationRep:
    (Original post by juannypacquiao)
    I initially placed the plant in the solution so it would rise up the xylem then I would cut it and place it under the microscope. Is that still correct?
    I think this method is fine, but surely you can still dye it after cutting?
    Offline

    14
    ReputationRep:
    (Original post by juannypacquiao)
    Was I correct in assuming that for the "red dye" question you had to place a plant in a beaker filled with the solution? Not just cut a piece then stain it?
    Yep so you put it in the red dye (eosin) solution for 1-2 days then cut stem and place under microscope red bit is xylem bit next to it that isnt coloured is phloem
    Offline

    13
    ReputationRep:
    If you cut and then dye, the dye is just going to come out..
    Offline

    3
    ReputationRep:
    When we get our results in August, do we get infividual paper marks or just a final percentage and grade of the 3 papers of each science?
    Offline

    1
    ReputationRep:
    Perhaps the cutting then dying will still be accepted but the max marks available may be lower. Just my thoughts...?
    Offline

    11
    ReputationRep:
    (Original post by CIEBioloysifh)
    If you cut and then dye, the dye is just going to come out..
    Why is this
    Offline

    11
    ReputationRep:
    (Original post by juannypacquiao)
    Perhaps the cutting then dying will still be accepted but the max marks available may be lower. Just my thoughts...?
    That's not really how the mark schemes work..
    Offline

    14
    ReputationRep:
    (Original post by 123Master321)
    Why is this
    If you look in the textbook with this practical you have to let the xylem become stained with the red dye and the only way this can be achieved is by putting it in a pot of red dye solution and leaving for 1-2 days there's no other way
    Offline

    1
    ReputationRep:
    (Original post by 123Master321)
    That's not really how the mark schemes work..
    There have been times in markschemes where it says "A [insert answer here]" but then it says "[MAX 2]" or something even when the question is out of 4 so you can't get all the marks for it
    Offline

    2
    ReputationRep:
    Guys,

    For the difference between the xylem and phloem vessels, I wrote the xylem is hollower.......

    Thats right yea?
    Offline

    13
    ReputationRep:
    xylem was wider
    Offline

    13
    ReputationRep:
    hollower implies there is nothing was inside it, I wouldn't use hollower as an adjective, I don't think you'd get the mark
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brussels sprouts
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.