What does a surface area/volume ratio of 3: 1 mean for a cell’s ability to get materials across its membrane, compared to the cell with a ratio of 6: 1?

As compared to 6:1, the SV ratio is lower for cell with ration 3:1 and hence more will be the crossing of material across 6: 1 cell

Explanation:

Cell with surface area/volume ratio of 3:1  has lower permeability or "ability to get materials across  membrane" as compared to cell with surface area/volume ratio of 6:1 . The smaller the SV ratio, the smaller will be the surface area of the cell that allow absorption and transmittance of substance across a membrane and hence the permeability will be smaller for 3:1 S V cell.

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explanation:

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.