Question

Bromothymol Blue is an indicator used to detect the presence of _______________________________ gas.

During cellular respiration, _________________gas is given off and turns the indicator _____________.
Why did you initially blow into the solution to turn it yellow?_______________________________________
During the process of _________________________ in plants, the indicator if yellow from respiration will
turn back to ____________________ because plants take in _______________ gas to give off
________________ gas.
Do you support or reject your hypothesis? What qualitative data did you use to come to your conclusion?

What is the significance of the test tube without elodea?

Word bank here: Carbon dioxide,Cellular Respiration, Photosynthesis, Oxygen, Blue, Yellow.

Answer 1

Bromothymol Blue is used to detect the presence of carbon dioxide gas. The significance of the test tube without elodea is that it serves as a control.

Step-by-step explanation:

Bromothymol Blue is an indicator used to detect the presence of carbon dioxide gas. The significance of the test tube without elodea is that it serves as a control.

Elodea is a plant that undergoes photosynthesis and releases oxygen gas. If the test tube with elodea turns the bromothymol blue from blue to yellow, it indicates that the plant is producing oxygen through photosynthesis. On the other hand, if the test tube without elodea remains blue, it suggests that there is no photosynthesis occurring and therefore no oxygen being produced.