Gas exchange and light
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6 Terms
Respiration and light intensity
Plants respire at the same rate all the time.
The rate of respiration is NOT dependent on light intensity.
CO2 is released at the same rate all day/night.
Photosynthesis and light intensity
The rate of photosynthesis increases with light intensity.
Most of the O2 is released during the daytime.
Photosynthesis doesn’t occur at night.
Gas exchange in the day
Respiration taking place.
O2 used by plant cells and CO2 released.
Photosynthesis taking place.
Net concentration of CO2 and O2 during the day
MORE O2 being released than used up.
Net concentration of O2 increases.
LESS CO2 being released than used up.
Net concentration of CO2 decreases.
Gas exchange during the night
Respiration taking place.
O2 being used by plant cells, and CO2 released.
Photosynthesis taking place.
Net concentration of CO2 and O2 during the night
No O2 produced.
Net concentration of CO2 increases.
Note 
Flashcards (43)