Question

Choose correct pairs from the following: 

• A. II, IV
• B. I, III
• C. I, IV
• D. II, III

Hint:

Remember, not all symbiotic relationships in the soil involve nitrogen fixation. Mycorrhizae primarily enhance nutrient absorption from the soil.

Answer 1

The Correct Option is C

Glomus (I), a type of mycorrhiza, forms a mutualistic association with plant roots to enhance nutrient uptake but does not fix nitrogen. Oscillatoria (IV) is a genus of filamentous cyanobacteria known for its ability to fix atmospheric nitrogen. This cyanobacteria contribute significantly to the nitrogen cycle in aquatic ecosystems.