The box below shows a list of supplies that are available in a laboratory.
• four flasks with stoppers
• floodlight
• tap water
• graduated cylinders
• small aquarium plants
• four small fish
• bromthymol blue (a chemical indicator
that changes color from blue to yellow as
the level of carbon dioxide in a solution
increases)
The class sets up an experiment with the four
flasks as shown
Pusk : 100 ml water, I ml bronhymol bloc, plant
Flask 2: 100ml. water, 1 ml brothymol blue, 2 small fish
Plack 3: 100 ml water, I mlbrothymol blue, 2 small fish, plant
Flask 4 100 mL water, Im brothymol blue
Which flasks contain organisms undergoing photosynthesis