first year NCERT page no 183,
how many years it would take for the movement of molecules over a distance of 1m within a plant by diffusion alone?
It will take approximately 2 years for the movement of molecules over a distance of 1m within a plant by diffusion alone.
Around 2.5s are taken for the movement of a molecule by diffusion alone to travel 50µm. Thus, to travel 1m, 0.5 × 106 seconds is taken. One year has 31536× 103 sec which means 2 years will be taken for the movement by diffusion alone to travel a distance of 1m.