$-[4]$

$4($a$)$ Complete the table below by placing an $"V"$ in the correct column$($s$)$ next to each description

$\backslash$table$[[$Statement$,\backslash$table$[[$Isotonic$],[$solution$]],\backslash$table$[[$Hypotonic$],[$solution$]],\backslash$table$[[$Hypertonic$],[$solution$]]],[1.$ Causes a cell to swell,,,$],[2.$ Doesn't change the shape of a cell,,,$],[3.$ Causes osmosis,,,$],[4.$ Causes a cell to shrink,,,$]]$

$[3]$

$($b$)$ A plant cell was placed in a solution of distilled water. What word is used to describe the appearance of the plant cell after $20$ minutes?

$q,$

$1]$

$($c$)$ Suggest why the plant cell will not burst.

$q,$

$q,$

$5$ Name three factors that may affect the rate of diffusion.

$q,$

$6$ The graph shows the effect of different partial pressures of carbon dioxide on the oxygen dissociation curves.

$p\frac{U_2}{K}ra$

$($a$)$ Which of the curves $a,b$ or $c$ represents the greatest carbon dioxide concentration?

$[1]$

$($b$)$What name is given to the effect shown in the graph?

$($c$)$ Explain how this enables respiring tissues to effectively obtain oxygen.

$[3]$

$($d$)$ State one other factor which has a similar effect on the oxygen dissociation curve.