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Which one of the following is not a nitr...

Which one of the following is not a nitrogen-fixing organism ?

A

Anabaena

B

Nostoc

C

Azotobacter

D

Pseudomonas

Text Solution

Verified by Experts

The correct Answer is:
D
Pseudomonas is not a nitrogen-fixing bacteria. Pseudomonas is a saprophytic bacteria. Pseudomonas are used for biodegradation of organic pollutant like petroleum spillage. Azotobacter is a free living nitrogen fixing bacteria. Anabaena and Nostoc are free living nitrogen fixing cyanobacteria.
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