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Question
Which of the following is a free living nitrogen fixing bacteria?
Which of the following is a free living nitrogen fixing bacteria?
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Solution
The correct option is D Bacillus polymyxa
Paenibacillus polymyxa is capable of fixing nitrogen. The species may also be known as Bacillus polymyxa. It is used as a soil inoculant in agriculture and horticulture. Biofilms of it growing on plant roots have been shown to produce exo-polysaccharides, which protect the plants from pathogens. The interactions between this bacterial species and plant roots also cause the root hairs to undergo physical changes.So, the correct answer is option B.
Paenibacillus polymyxa is capable of fixing nitrogen. The species may also be known as Bacillus polymyxa. It is used as a soil inoculant in agriculture and horticulture. Biofilms of it growing on plant roots have been shown to produce exo-polysaccharides, which protect the plants from pathogens. The interactions between this bacterial species and plant roots also cause the root hairs to undergo physical changes.
So, the correct answer is option B.
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