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Sydney drew a flow chart to illustrate the nitrogen cycle.
Which labels best complete the flow chart?
Bacteria fix
nitrogen from
the air
X: Producers undergo photosynthesis.
Y: Nitrogen compounds are released into the air.
X: Nitrogen compounds are released into the air.
Y: Producers undergo photosynthesis.
X: Free nitrogen is in the atmosphere.
Y: Producers absorb nitrogen compounds through their
roots
X: Producers absorb nitrogen compounds through their
roots
Y: Free nitrogen is in the atmosphere.
Y
Consumers
eat other
organisms
Decomposers
break down
dead organisms
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