The diagram shows part of the nitrogen cycle.
Which numbers represent decomposing bacteria and nitrifying bacteria?
▶️ Answer/Explanation
Ans: C
In the nitrogen cycle:
Decomposing bacteria (1) break down organic nitrogen (from dead organisms/waste) into ammonium.
Nitrifying bacteria (2) then convert ammonium to nitrites and nitrates.
Option C correctly pairs these bacterial roles. Other options either reverse the processes (A, D) or include incorrect nitrogen-fixing bacteria (B).
Which diagram shows part of the nitrogen cycle?
▶️ Answer/Explanation
Ans: B
The nitrogen cycle involves key processes like:
1. Nitrogen fixation (conversion of N2 to ammonium)
2. Nitrification (ammonium → nitrites → nitrates)
3. Denitrification (nitrates → N2)
Diagram B correctly shows one of these nitrogen transformations, matching a standard nitrogen cycle representation.
The other diagrams (A, C, D) depict different biogeochemical cycles (carbon/water) or incorrect nitrogen processes.