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Question
Name the cell which is responsible for nitrogen fixation in cyanobacteria.
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Solution
Heterocyst is responsible for nitrogen fixation in cyanobacteria. They are capable of differentiating. unique cells that fix nitrogen.
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Match Column - I with Column - II.
| Column - I | Column - II | ||
| (a) | Nitrococcus | (i) | Denitrification |
| (b) | Rhizobium | (ii) | Conversion of ammonia to nitrite |
| (c) | Thiobacillus | (iii) | Conversion of nitrite to nitrate |
| (d) | Nitrobacter | (iv) | Conversion of atmospheric nitrogen to ammonia |
Choose the correct answer from the options given below.
In the Nitrification process, the ammonium compounds are oxidised to soluble ______.
Assertion (A): Plants and animals can utilize atmospheric nitrogen.
Reason (R): The atmosphere is a rich source of nitrogen.
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