Q. Which one of the following is not a biofertilizer?
A) Mycorrhiza
B) Agrobacterium
C) Rhizobium
D) Nostoc
Explanation
[Solution from source] Agrobacterium tumefaciens is a plant pathogen that causes crown gall and is used as a vector in genetic engineering, not as a biofertiliser. Rhizobium and Nostoc fix nitrogen, and mycorrhiza helps phosphorus uptake. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.