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    hi, i have a question regarding biology
    say you do an experiment like stated in a book, and say you weigh a plant sample, put it into a sucrose solution, and weigh it after to measure the change in weight
    what if that plant cell BECAME plasmolysed,
    so the cells in the plant lost WATER , so the cell membrane MOVED OUT.
    and it became PLASMOLYSED
    what would you have between the cell wall and membrane?
    what would/ how would this affect your results
    tyvm, looking foward to replies

    PS ALSO : how would you represent this all on a graph? what would you use to represent the differnet things?
    how do you represent perentage change in mass on a LINE graph?
    tyvm!
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    (Original post by sixthformer)
    hi, i have a question regarding biology
    say you do an experiment like stated in a book, and say you weigh a plant sample, put it into a sucrose solution, and weigh it after to measure the change in weight
    what if that plant cell BECAME plasmolysed,
    so the cells in the plant lost WATER , so the cell membrane MOVED OUT.
    and it became PLASMOLYSED
    what would you have between the cell wall and membrane?
    what would/ how would this affect your results
    tyvm, looking foward to replies

    PS ALSO : how would you represent this all on a graph? what would you use to represent the differnet things?
    how do you represent perentage change in mass on a LINE graph?
    tyvm!
    I could help if only you could explain the question much more clearly
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    (Original post by jonathan3909)
    I could help if only you could explain the question much more clearly
    Say you had 5 plant strips of equal mas
    and you put them into FIVE different sucrose concentrated solutions
    and measured the change in mass before, and after.
    say you had:

    percentage change in mass of 0.00 mol dm^3 = 10%
    the next conc = 7%
    then 0%
    then -2%
    then -3%

    how would you plot the results
    on a graph?
    could you draw me one ?
    ty
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    (Original post by sixthformer)
    Say you had 5 plant strips of equal mas
    and you put them into FIVE different sucrose concentrated solutions
    and measured the change in mass before, and after.
    say you had:

    percentage change in mass of 0.00 mol dm^3 = 10%
    the next conc = 7%
    then 0%
    then -2%
    then -3%

    how would you plot the results
    on a graph?
    could you draw me one ?
    ty
    I don't really understand either.
    But if the question is what kind of graph to plot the data on.. I'd suggest a bar chart..
    EDIT: with the concentration as your x-axis and the mass of plant as your y. the negitive values would be plotted below the x-axis.
    sorry I didn't read it properly first time
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    (Original post by sixthformer)
    Say you had 5 plant strips of equal mas
    and you put them into FIVE different sucrose concentrated solutions
    and measured the change in mass before, and after.
    say you had:

    percentage change in mass of 0.00 mol dm^3 = 10%
    the next conc = 7%
    then 0%
    then -2%
    then -3%

    how would you plot the results
    on a graph?
    could you draw me one ?
    ty
    What I would do,

    The concentration of sucrose is your independent variable, so this usually goes on the X axis. Then (obviously by elimination!) put the % change in mass as your Y axis title. I would plot it as a scatter graph (as percentage change is continuous data... bar graphs are usually used for categoric data) And if is there is a trend, draw a free-hand curve (don't join each point with a ruler! and that relationship doesn't seem linear so I wouldn't use a straight line either.
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    (Original post by sixthformer)
    hi, i have a question regarding biology
    say you do an experiment like stated in a book, and say you weigh a plant sample, put it into a sucrose solution, and weigh it after to measure the change in weight
    what if that plant cell BECAME plasmolysed,
    so the cells in the plant lost WATER , so the cell membrane MOVED OUT.
    and it became PLASMOLYSED
    what would you have between the cell wall and membrane?
    what would/ how would this affect your results
    tyvm, looking foward to replies

    PS ALSO : how would you represent this all on a graph? what would you use to represent the differnet things?
    how do you represent perentage change in mass on a LINE graph?
    tyvm!
    I wish I understood your question.......

    But when a plant cell is plasmolysed you have the external solution between the cell wall and the protoplast....so in your case it will be the sucrose solution.
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    (Original post by Daniel-Ballingall)
    I don't really understand either.
    But if the question is what kind of graph to plot the data on.. I'd suggest a bar chart..
    EDIT: with the concentration as your x-axis and the mass of plant as your y. the negitive values would be plotted below the x-axis.
    sorry I didn't read it properly first time
    would you draw a line or curve, and when do you know when to do what?ty
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    (Original post by butterflyeffect1)
    What I would do,

    The concentration of sucrose is your independent variable, so this usually goes on the X axis. Then (obviously by elimination!) put the % change in mass as your Y axis title. I would plot it as a scatter graph (as percentage change is continuous data... bar graphs are usually used for categoric data) And if is there is a trend, draw a free-hand curve (don't join each point with a ruler! and that relationship doesn't seem linear so I wouldn't use a straight line either.
    say you had two y axises, above is positive change, and below is negative
    and the points went downwards
    how do i know wether or not to use a curve , or a line
    tyvm +1
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    (Original post by sixthformer)
    say you had two y axises, above is positive change, and below is negative
    and the points went downwards
    how do i know wether or not to use a curve , or a line
    tyvm +1
    Those axes sound good. There is no definite rule, judge which would represent the relationship best. Do not try to force a straight line for the sake of it if a lot of the points would be quite far from it. If the data you said earlier is what you have measured the relationship doesn't sound linear so I wouldn't use a straight line.
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    (Original post by butterflyeffect1)
    Those axes sound good. There is no definite rule, judge which would represent the relationship best. Do not try to force a straight line for the sake of it if a lot of the points would be quite far from it. If the data you said earlier is what you have measured the relationship doesn't sound linear so I wouldn't use a straight line.
    what you think is what my gut instinct tells me
    two continuous data like this have to be curve.
 
 
 
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