A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27°C. Which gas is the plant producing.. a
oxygen
b
nitrogen
c
carbon dioxide
d
hydrogen

A

Explanation: plants give off oxygen not carbon dioxide

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.