First slide

Kingdom Monera

Question

Which one is filamentous, autotrophic and can fix atmospheric nitrogen through specialized cells?

Easy

A

Frankia
B

Nostoc
C

Azotobacter
D

Rhizobium

Solution

Nostoc is a filamentous cyanobacteria. It has vegetative cells which help in carbon dioxide fixation hence they are autotrophic. They have specialized cells called heterocyst that help in fixation of atmospheric nitrogen.

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