Which of the following organisms cannot fix n | vedclass

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(B) $Azotobacter$ is a free-living nitrogen-fixing bacterium.$Oscillatoria$,$Anabaena$,and $Nostoc$ are cyanobacteria capable of fixing atmospheric ni

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(B) $Azotobacter$ is a free-living nitrogen-fixing bacterium.$Oscillatoria$,$Anabaena$,and $Nostoc$ are cyanobacteria capable of fixing atmospheric nitrogen due to the presence of specialized cells called heterocysts or through other nitrogen-fixing mechanisms.$Volvox$ is a green alga (Chlorophyta) that does not possess the nitrogenase enzyme complex required for nitrogen fixation.Therefore,only $Volvox$ $(D)$ cannot fix nitrogen.

Which of the following organisms cannot fix nitrogen?
$A.$ Azotobacter
$B.$ Oscillatoria
$C.$ Anabaena
$D.$ Volvox
$E.$ Nostoc
Choose the correct answer from the options given below:

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Which of the following organisms cannot fix nitrogen?$A.$ Azotobacter$B.$ Oscillatoria$C.$ Anabaena$D.$ Volvox$E.$ NostocChoose the correct answer from the options given below: