Denitrification is

(1) Reduction of nitrate to nitrite

(2) Reduction of nitrate to nitrogen

(3) Reduction of nitrous to nitrite

(4) Reduction of nitrogen to ammonia

(1) Pesudomonas

(2) Thiobacillus

(3) Nitrobacter

(4) Both A and B

(1) Electrical Nitrogen Fixation

(2) Biological Nitrogen Fixation

(3) Industrial Nitrogen Fixation

(4) Both B and C

(1) Nitrogenase

(2) Pyruvate kinase

(3) Glucokinase

(4) Enolase

(1) Nitrate to Nitrite

(2) Nitrogen to Ammonia

(3) Nitrogen to Nitrite

(4) Nitrogen to Nitrate

1. Glomus

2. Azotobacter

3. Frankia

4. Azolla

(1) Anabaena

(2) Azotobacter

(3) Beijernickia

(4) Rhodospirillum

(1) Rod shaped

(2) Legume-bacteria relationship

(3) Has relationship with roots of several legumes such as alfalfa, sweet clover sweet pea, Lentils, garden Pea, broad bean and clover beans

(4) All of these

(1) Lichene

(2) Nodules

(3) Beads

(4) Pneumathodes

(1) Free living in soil

(2) Act as symbiont and fix nitrogen

(3) One is found on the roots of non-leguminous plants

(4) All of these