Nitrogen Cycle (AQA A-Level Biology): Flashcards
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Nitrogen gas % in atmosphere
Nitrogen gas % in atmosphere
78%
Form of nitrogen absorbed by plant roots
Form of nitrogen absorbed by plant roots
Nitrate ions ()
Process by which plants absorb nitrate ions
Process by which plants absorb nitrate ions
Active transport
Four main stages of the nitrogen cycle
Four main stages of the nitrogen cycle
N fixation, ammonification, nitrification, denitrification
What nitrogen fixation converts
What nitrogen fixation converts
Atmospheric into usable nitrogen compounds
Two types of nitrogen-fixing bacteria
Two types of nitrogen-fixing bacteria
Free-living and mutualistic
What ammonification produces
What ammonification produces
Ammonia from organic nitrogen compounds
Two-stage nitrification process
Two-stage nitrification process
Conditions required for denitrification
Conditions required for denitrification
Waterlogged, anaerobic (low oxygen) conditions
What denitrification converts
What denitrification converts
Soil nitrates into nitrogen gas