1. The diagram shows a respirometer used to compare respiration in two types of germinating seeds.

A student set up the respirometer to measure oxygen consumption.

• The narrow tube contained coloured water.

• The position of the meniscus was noted at the beginning of the experiment.

• The tube was left for 20 minutes.

• The new position of the meniscus was noted.

• The experiment was repeated with the other type of seed.

The student investigated two types of seed, pea and sunflower:

• Pea seeds store mainly starch

• Sunflower seeds store mainly lipid

Which of the following, A to D, describes the results you would expect with each type of seed?