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Question

Among nitrobacter, rhizobium, nitrosomonas, nitrite bacteria, pseudomonas — which one is found in the fourth phase of the nitrogen cycle?

(a) Rhizobium

(b) Nitrosomonas

(c) Nitrobacter

(d) Pseudomonas

WBBSE Class X Life Science 05 (a) Nitrogen 01 Mark 2025

Answer

(d) Pseudomonas

Explanation:

The fourth phase of the nitrogen cycle is denitrification, where nitrate is converted to nitrogen gas by denitrifying bacteria. Pseudomonas is an example of denitrifying bacteria involved in this process.

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