1.1. Table 1 shows the names of three groups of arthropods and some of their characteristics.

Place ticks (✓) in the boxes to show the characteristics present in each group. 

Table 1

1.2. Fig. 1 shows the apparatus used by some students during an investigation.

The apparatus is drawn as seen from above.

Fig. 1

Some arthropods were placed in the container.

A drop of red dye was inserted into the capillary tube.

The drop of red dye in the capillary tube gradually moved towards the arthropods.

(i) Explain why the drop of red dye moved towards the arthropods.

The investigation shown in Fig. 1 was repeated at different temperatures.

Fig. 2 shows the results. 

[3]

Fig. 2

(ii) State the trend shown in Fig. 2.

[1]

(iii) Calculate the percentage increase in the rate of dye movement between 10°C and 20°C. 

Show your working.

[2]

1.3. (i) State the group of arthropods the student used in Fig. 1.

[1]

(ii) Describe the features visible in Fig. 1 that identify this group.

[3]