Question

do dead cells exhibit osmosis

Answer 1

yes cell wall of plant is dead but then also it do Osmosis because for Osmosis we need semipermeable membrane and in that we will get it

Answer 2

Yes it exhibit osmosis if the cell is put in hypotonic solution then the water is absorbed by the cells and it Bulges. If it bulges beyond it's limit then the cell bursts.
If the solution is put in hypertonic solution then the cell shrinks and and becomes into small size.

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