1.1. The diagram below shows a representation of a plant cell.

Describe the functions of structures P Q, and R.

1.2. (i) Label the diagram in part (a) with an S to indicate the location of the cell wall.

(1)

(ii) Describe the function of the cell wall.

(1)

1.3. Plants are one of the five groups of eukaryotes.

(i) Name another group of eukaryotes in which you might find structure P labelled in part (a).

(1)

(ii) State one other feature of the group named in part (i).

(1)

1.4. The cell shown below is found inside a salivary gland.

Suggest what can be concluded about the activities of the salivary gland cell from the image above.