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

Question

Which one of the following is not a nitrogen-fixing organism? (A) Anabaena (B) Nostoc (C) Azotobacter (D) pseudomonas

Tardigrade Admin · Accepted Answer

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.

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

Anabaena

Nostoc

Azotobacter

pseudomonas

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.