Which of the following is a free living aerobic non-photosynthetic nitrogen fixer ?

Question

Which of the following is a free living aerobic non-photosynthetic nitrogen fixer ?

(a) Rhizobium

(b) Azotobacter

(c) Azospirillum

(d) Nostoc

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct option (b) Azotobacter

Explanation :

Azotobacter is a free living, aerobic non-photosynthetic, i.e. saprophytic bacteria. It retains the capability of fixing atmospheric nitrogen, i.e. fixation of atmospheric dinitrogen into ammonia.

4 views Answered 2023-02-05 15:29