Which one of the following is a free-living obligate anaerobic bacterium?</h2></div>

Explain how <i>Rhizobia </i>are useful for farmers.</h2></div>

Which of the following nitrogen-fixing bacteria is present in root nodules of leguminous plants?</h2><…

Streptomycin is produced by</h2></div>

Which of the following is not used as a biopesticide?</h2></div>

A peculiar odour that occurs in marshy areas and cowsheds is due to gas produced by.</h2></div>

Streptomycin is prepared from ?</h2></div>

<i>Rhizobium</i> bacteria are important because they help in carbon fixation.</h2></div>