Below is a list of supplies 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.
Pak 100. www. bymel wee plane
Pak 200w, byl Noe 2 mall fish
Pak 100 m. well bromymel e 2 wall fish plant
Pak 100 m. ll. bromyal blue
Which flasks contain organisms undergoing cellular respiration?
Flask 1, 2 and 3
O Flask 1 and 3
O Flask 2 and 3
O None