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Bacterial benefits of root nodules
The gorse plant has nodules on its roots. The nodules are part of the living root tissue. Bacteria which convert nitrogen gas into soluble nitrate ions live in the nodule tissue. Figure 9 shows the nodules on the roots.
Suggest how the nodules benefit the bacteria.
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Marking points
- 1 Bacteria obtain glucose/sugar from the plant.
- 2 Glucose is used for respiration or to release energy, or for making other named substances.
Full-mark answer
The bacteria get glucose from the plant. They can use the glucose in respiration to release energy.