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ScienceCLASS 9CBSE

answered 27 Mar 2026

Oxygen is harmful for (a) ferns (b) nitrogen fixing bacteria (c) chara mango tree

A.VERIFIED ANSWERfact-checked by tutors

Soln:

Answer is (b) nitrogen fixing bacteria

Explanation:

Nitrogen fixing bacteria are anaerobic, they get killed when exposed to oxygen hence oxygen is harmful for them

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