Question

Which of the following statements is/are incorrect?

(i) Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial habitats

(ii) Anabaena, Nostoc and Oscillatoria are photosynthetic N₂ – fixing cyanobacteria.

(iii) Tolypothrix (BGA) can increase rice production by about 20%

(iv) BGA add organic matter to the soil and increase its fertility.

(v) In our country, biofertilizers are not available

commercially in the markets for farmers.

• A. (iv) Only
• B. (iii) Only
• C. (v) Only
• D. None of these

Answer 1

Answer: (C)

(v) Only