Nitrobactor converts Nitrites to nitrates, Azotobacter and Clostrnium are N2 fixing bacteria found Free in soil

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Free Online Mock Biology Multiple Choice Test on Biosphere

Sub Category : Biosphere	Test : 4	Time Left :
1.Nitrobactor converts
(1) Nitrites to nitrates (2) NH3 to nitrites (3) N2 into nitrates (4) None
1 2 3 4
2.Phosporus is found in rocks in combination of
(1) Ca (2) Fe (3) Al (4) All
1 2 3 4
3.Azotobacter and Clostrnium are N2 fixing bacteria found
(1) In modulated roots (2) Free in soil (3) Leaves of plants (4) None
1 2 3 4
4.Non biological N2 fixation is ?
(1) Electrochemical (2) Photochemical (3) (1) + (2) (4) None
1 2 3 4
5.Phosphorus cycles in the form of ?
(1) HPO-3 (2)P2 (gas) (3) PO4power3- (4) Al2 (PO4)3

1 2 3 4
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Free Online Mock Biology Multiple Choice Test on Biosphere