The table below shows data collected in an experiment about gases in inhaled and exhaled air.

percentages of chemicals in air

o2
co2
inhaled
20.94%
0.03%
exhaled
16.37%
4.46%

suppose a similar experiment was set up to measure changes in air composition immediately before and two days after twenty potted plants were placed in a clear, sealed aquarium near a window.

percentages of chemicals in air

o2
co2
before
20.94%
0.03%
after
?
?

how would the second row of values in the plant experiment most likely compare to the second row of values in the original experiment?
oxygen levels would be higher, but carbon dioxide levels would be lower.
carbon dioxide levels would be higher, but oxygen levels would be lower.
oxygen levels would be higher, but carbon dioxide levels would be the same.
carbon dioxide levels would be higher, but oxygen levels would be the same.