Select the correct match.
(A) Nitrosomonas - Nitrite to nitrate
(B) Thiobacillus - Denitrification
(C) Nostoc - Free-living nitrogen-fixer
(D) Azotobacter - Anaerobic nitrogen-fixer

A and B

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C and D

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B and C

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B and D

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Solution

The correct option is C B and C
Nitrosomonas convert nitrogen gas to nitrite.
Thiobacillus helps in denitrification.
Nostoc is a free-living nitrogen fixer.
Azotobacter is an aerobic nitrogen-fixer.
Thus, the correct answer is 'B and C.'

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Similar questions

Select the matched ones:

(1)Nitrosomonas - Nitrite to nitrate

(2)Thiobacillus - Denitrification

(3)Nostoc– Free - living nitrogen-fixer

(4)Azotobacter - Anaerobic nitrogen-fixer

(a)	Nitrobacter	(i)	Free living aerobic nitrogen fixer
(b)	Clostridium	(ii)	Converts ammonia into nitrite
(c)	Nitrosococcus	(iii)	Changes nitrite to nitrate
(d)	Azotobacter	(iv)	Free living anaerobic nitrogen fixer

(A) Nitrobacter	(i) Free living aerobic nitrogen fixing organism
(B) Clostridium	(ii) Converts nitrite to nitrates
(C) Nitrosococcus	(iii) Converts ammonia to nitrite
(D) Azotobacter	(iv) Free living anaerobic nitrogen fixing organism

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