In the following passage the numbered spaces can be filled with biological terms.

During photosynthesis, plants produce (1) compounds which contain carbon, such as carbohydrates, lipids and proteins. Most of the sugars synthesised by plants are used by the plant in (2). The rest are used to make other groups of biological molecules. These biological molecules form the biomass of the plants. Biomass can be measured in terms of mass of (3) per given area per given time. The chemical energy store in dry biomass can be estimated using (4).

Write the correct biological term beside each number below, that matches the space in the passage.

(1)

(2)

(3)

(4)

Describe the light-independent reaction of photosynthesis.