Which of the following is not cynobacteria?

(1) Anabaena

(2) Nostoc

(3) Oscillatoria

(4) Glomus

Which of the following adds organic matter to the soil and increase the fertility of the soil?

Biochemical oxygen demand is

Higher the biodegradable organic matter in sewage

Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I                                                       Column II
I. Roots of leguminous plants                          1. Frankia
II. Azolla                                                       2. Mycorrhiza
III. Glomus                                                    3. Anabaena
IV. Alnus                                                        4. Rhizobium
Codes:
I II III IV
A. 1 2 3 4
B. 2 1 4 3
C. 2 1 3 4
D. 4 3 2 1

Match each item in Column I with one item in Column II and choose your answer from the codes given below:
Column I                                      Column II
I. Aspergillus niger                       1. Clot buster
II. Streptococcus                          2. Citric acid
III. Trichoderma                           3. Cyclosporin A
IV. Monascuspurpureus                 4. Statins
Codes:
I II III IV
A. 1 2 3 4
B. 2 1 4 3
C. 2 1 3 4
D. 1 2 4 3

Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I                                 Column II
(GM microbe)                           (Application)
I. Rhizobium meliloti                 1. Prevention of frost damage
II. Pseudomonas                       2. Nitrogen fixation in fluorescence cereals
III. Pseudomonas putida            3. Scavenging of oil spills
IV. Trichoderma                         4. Biocontrol of fungal diseases
Codes:
      I   II   III   IV
A.   1   2    3     4
B.   2   1   4      3
C.   2   1   3      4
D.   1   2   4      3

In the given diagram, the gas X can be:

The virus shown here is a causative agent of:

Nitrogen fixation is carried out by: