MCQ
Which of the following is wrongly matched?
- AHumus - Abiotic component
- BRhizobium - Free- living nitrogen fixer
- CShorea robusta -Tropical deciduous forest
- DCedrus deodara - Coniferous forest
Explanation:
Rhizobium is a symbiotic nitrogen fixer. They are soil bacteria and becomes established inside root nodules of legumes. In order to express genes for nitrogen fixation, rhizobia require a plant host; they cannot independently fix nitrogen. In general, they are Gram-negative, motile, non-sporulating rods.
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