A-LevelBiologyBiodiversity and conservationMay/June 2015Paper 1 Q391 Mark
A farmer grows a different crop in a field each year for three years. In the fourth year he grows a leguminous crop, such as clover, and then ploughs this into the soil. The next year he starts the rotation again. How does the fourth year crop add mineral ions to the soil?
Ano decomposition; yes nitrification; yes nitrogen fixation
Byes decomposition; no nitrification; yes nitrogen fixation
Cyes decomposition; yes nitrification; no nitrogen fixation
Dyes decomposition; yes nitrification; yes nitrogen fixation
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of biodiversity and conservation within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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