Biology · Biofertilizers
Azospirillum is categorized as an associative symbiont because it:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Forms functional root nodules in legumes.
- 2Lives strictly inside plant vascular tissue as an obligate parasite.
- 3Associates closely with the root surface (rhizosphere) without forming nodules.✓
- 4Is a strictly anaerobic nitrogen fixer.
Correct answer
Associates closely with the root surface (rhizosphere) without forming nodules.
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