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Q1 / 5
Cycles within nature
Higher
2 marks
Why are leguminous plants (e.g. peas, beans) useful in agriculture?
A
Root nodule bacteria (Rhizobium) fix N₂ → enrich soil with nitrogen → less artificial fertiliser needed
B
They produce more CO₂ to improve photosynthesis
C
They absorb all pests from the soil
D
They prevent all other plants from using nitrogen
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Cycles within nature — Biology (4BI1) | Smartzi