Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 Biology Plant Physiology Mineral Nutrition

Which among the following microorganisms are important in biological N2 fixation and nodulation in roots ?

(a) Rhizobium

(b) Azotobacter

(c) Rhodospirillum

(d) Frankia  

1
(b) and (c)
2
(c) and (d)
3
(a) and (c)
4
(a) and (d)
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