NEET2025Botany-Microbes in Human Welfare
NEET 2025 Botany Nitrogen Fixation Assertion Reason Question
Type: Assertion Reason-conceptual-Medium-Class 12
Which of following organisms cannot fix nitrogen?
A. Azotobacter
B. Oscillatoria
C. Anabaena
D. Volvox
E. Nostoc
Choose the correct answer from the options given below:
A
A only
B
D only
C
B only
D
E only
Correct Answer
Option B
Detailed Explanation
Volvox is a green algae and does not fix nitrogen. Other options are capable of nitrogen fixation.
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