1.1. Extended Tier Only

Fig. 1 shows a root hair cell.

Fig. 1

Describe how this cell is adapted for absorption of water by osmosis.

1.2. Extended Tier Only

Fig. 2 shows two cells after the effects of osmosis.

Fig. 2

Identify the correct description for each cell by drawing a line between the cell and the box that contains the most accurate description.

1.3. A student carried out an experiment on osmosis in plant tissue. They set up their investigation as shown in Fig. 3.

Fig. 3

Each beaker contained potato discs in a solution of sugar or distilled water. The student found that the potato discs in Beaker 5 decreased in mass.

Explain the reason for this.

1.4. Give one example of a variable that would need to be controlled during the experiment from part (c).