1.1. Complete the table by placing a tick (✓) in the correct boxes to indicate which cell features can be found in eukaryotic cells only, prokaryotic cells only, or both types of cell. 

1.2. The table below shows the average size of different types of cells and organelles.

(i) Calculate how many times bigger a plant cell is compared to a bacterium.

(1)

(ii) Using evidence from the table, suggest why prokaryotic cells cannot contain a nucleus.

(2)

(iii) One scientific theory suggests that mitochondria used to be a type of bacteria that entered a eukaryotic cell and became mitochondria over time.

Identify evidence from the table that suggests this could be possible.

(1)

1.3. For each of the following examples, name the group of organisms to which the species belongs.