Question

Match the columns and choose the correct option

$\begin{array}{cccc}& \text{I}& & \text{II}\\ \text{(a)}& \text{Free living aerobic nitrogen fixers}& \text{1}& \text{Anabaena and Nostoc}\\ \text{(b)}& \text{Anaerobic nitrogen fixers}& \text{2}& \text{Pseudomonas and Thiobacillus}\\ \text{(c)}& \text{Nitrogen fixing cyanobacteria}& \text{3}& \text{Nitrosomonas and Nitrosococcus}\\ \text{(d)}& \text{Denitrifying bacteria}& 4& \text{Azotobacter}\\ \text{(e)}& \text{Nitrifying bacteria}& 5& \text{Rhodospirillum}\end{array}$

• A. a–4, b–5, c–1, d–2, e–3
• B. a–5, b–4, c–1, d–3, e–2
• C. a – 4, b – 5, c –2, d –3, e –1
• D. a – 4, b –3, c –1, d –2, e – 5

Answer 1

The correct option is A

a–4, b–5, c–1, d–2, e–3

Free living aerobic nitrogen fixers are Azotobacer. Rhodospirillum is anaerobic nitrogen fixer. Anabaena and Nostoc are niotrogen fixing cyanobacteria. Pseudomonas and Thiobacillus are dentirfying bacteria. Nitrosomonas and Nitrococcus are nitrifying bacteria.