A student placed a test tube containing elodea (an aquatic plant) and pond water 10 cm from a light source. He observed that the plant
gave off bubbles of a gas and counted how many bubbles were
released in one minute. He moved the plant farther away from the
light source to see if distance from the source made a difference. The
data table below shows his results.
DI
Light source
por Minute
Gas Production
Distance from Light Bubbles Produced
(cm)
10
40
20
30
7
40
4
The gas that was being produced was most likely? (7.5A)
A
carbon dioxide as a product of the process of photosynthesis
B
oxygen as a product of the process of photosynthesis
С
carbon dioxide as a reactant of the process of photosynthesis
D
oxygen as a reactant of the process of photosynthesis