mkla.p
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why is diffusion slower in the thickest agar jelly cube (largest volume) and what is the relevance of this to diffusion in cells????
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TheYearNiner
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(Original post by mkla.p)
why is diffusion slower in the thickest agar jelly cube (largest volume) and what is the relevance of this to diffusion in cells????
jelly aint liquid or solid so it diffuses easier i guess
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CoolCavy
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(Original post by mkla.p)
why is diffusion slower in the thickest agar jelly cube (largest volume) and what is the relevance of this to diffusion in cells????
hey, i think it is because a thicker agar cube has a larger diffusion pathway so it takes longer for the surrounding liquid to penetrate the cube and for it to lose it's pink colouring. This relates to cells as cells with thinner membranes/walls will allow molecules to diffuse in and out of the cell more quickly

hope that helped

source: doing biology AS
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TheOtherSide.
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Greater volume usually means that the surface area in comparison is lower (definitely in cubes). Lower surface area to volume ratio means slower diffusion.
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Pronged Lily
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Because the thickest jelly agar cube would have the largest volume (as you said) and thus the smallest surface area to volume ratio, which decreases rate of diffusion.
Similarly in cells, smaller SA/V ratio also means lower rate of diffusion.
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