Ah, the textbook says leghaemoglobin binds oxygen to protect nitrogenase, allowing it to convert atmospheric nitrogen to ammonia. But in my fields, I see it's not just about one bacterium and one plant. The real challenge is getting the right rhizobium strain to even *find* and infect the right root in our tired, acidic soils. My small joy is watching the students' faces when we inoculate pea seeds with our local strain—simple packets of clay and bacteria, more reliable than any diagram. That practical struggle, tate, is what fixation truly depends on.
#exams#study
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