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Subjects
Science State Board
Class 9
Environmental Science
Biogeochemical cycles
3.
Components of nitrogen and carbon cycle
Exercise condition:
2
m.
Choose the correct answer
:
1
.
Reduction of nitrate ions to gaseous nitrogen is called __________.
ammonification
nitrification
nitrogen assimilation
denitrification
2
.
During photosynthesis, plants release __________ into the atmosphere.
carbon monoxide
oxygen
nitrogen
carbon dioxide
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