Government CDS Question:

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Which one of the following is a free-living bacterium that helps in nitrogen fixation in soil?
(A) Azotobacter
(B) Anabaena
(C) Azolla
(D) Nostoc

Government CDS Interview Question
Government CDS Interview Question

Answer:

(A) Azotobacter

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Which one of the following is an example of vestigial organ in man?
(A) Jaw apparatus
(B) Ear muscles
(C) Canine teeth
(D) Humerus		Which one of the following is associated with the formation of brown air in traffic congested cities?
(A) Sulphur dioxide
(B) Nitrogen oxide
(C) Carbon dioxide
(D) Carbon monoxide