10 Multiple Choice Questions on Nitrogen Fixation
1. What is nitrogen fixation?
Conversion of ammonia to nitrogen gas
Conversion of atmospheric nitrogen to usable compounds
Photosynthesis in plants
Evaporation of nitrogen
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2. Which bacteria are known for nitrogen fixation in legumes?
Lactobacillus
E. coli
Rhizobium
Salmonella
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3. What percentage of Earth's atmosphere is nitrogen?
78%
50%
20%
1%
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4. Nitrogen fixation primarily occurs through:
Fungi
Lightning
Microorganisms
Photosynthesis
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5. What process does nitrogen fixation support in plants?
Respiration
Photosynthesis
Fermentation
Mineral absorption
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6. Which compound is produced through nitrogen fixation?
Carbon dioxide
Ammonia
Oxygen
Sulfate
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7. What type of relationship do legumes and nitrogen-fixing bacteria have?
Parasitic
Commensal
Mutualistic
Predatory
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8. Why is nitrogen fixation crucial for life?
It creates oxygen
It provides nitrogen compounds for plants
It converts carbon dioxide
It recycles waste
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9. Excessive use of nitrogen fertilizers leads to:
Soil enrichment
Soil degradation and pollution
Increased oxygen
Reduced greenhouse gases
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10. The nitrogen fixation process is most significant in:
Aquatic animals
Fungi
Leguminous plants
Carnivorous plants
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