Which of the following is/are diazotrophs?

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(D) Diazotrophs are organisms that can fix atmospheric nitrogen into a usable form such as ammonia. $Rhizobium$ and $Azotobacter$ are well-known nitro

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All of these

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(D) Diazotrophs are organisms that can fix atmospheric nitrogen into a usable form such as ammonia. $Rhizobium$ and $Azotobacter$ are well-known nitrogen-fixing bacteria. $Frankia$ and $Klebsiella$ also possess the ability to fix atmospheric nitrogen. $Anabaena$ and $Nostoc$ are cyanobacteria that fix nitrogen in specialized cells called heterocysts. Therefore,all the listed organisms are diazotrophs.

Similar Questions

Which of the following are free-living nitrogen-fixing bacteria?

Soil fertility can be increased by ..........

$A-$ The microbe $Frankia$ produces nitrogen-fixing nodules on the roots of non-leguminous plants.
$R-$ Both $Rhizobium$ and $Frankia$ are free-living in soil,but as symbionts,can fix atmospheric nitrogen.

Select the incorrect statement with respect to the biological nitrogen fixation by Rhizobium.

What will happen if $Rhizobium$ bacteria are introduced into a wheat field?

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