What color should the contents of tubes 3 and 4 be at the end of the experiment? What is the reason for the colors that you predicted in Part A for tubes 3 and 4? Explain your response in terms of the processes responsible for the color changes and the organism(s) involved in each case. If tube 4 was placed in the dark for the duration of the experiment, predict the color of the contents of tube 4 at the end of the experiment. Explain your response. Bromothymol blue (BTB) is a pH indicator that turns yellow in the presence of high levels of carbon dioxide (CO₂) in water. If BTByellow. If it has no CO₂, the solution with BTB will remain blue.Possible colors of BTB depending of the amount of CO2 present:Less CO₂Color blue:No CO₂, or very lowColor green:Intermediate CO₂More CO₂Color yellow:High CO₂s added to a water solution that has high levels of CO₂ the solution will turn Students are performing an experiment to understand the transfers of carbon between a photosynthetic organism, the aquatic plant Elodea, and a water snail. They are using test tubes that contain thesame amount of water, partially enriched in CO₂, and the same amount of BTB, to detect the presence of CO₂. The test tubes are placed in natural sunlight for the duration of the experiment, as shown in theimage. The contents of each test tube are as follows:Tube 1 Tube 2Tube 3 Tube 4TubeTube 1Tube 2Tube 3Tube 4ContentsWater + BTBWater+ BTB + 1 snailWater+ BTB + 1 ElodeaWater+ BTB + 1 Elodea + 1 snailWhat color should the contents of tubes 3 and 4 be at the end of the experiment?What is the reason for the colors that you predicted in Part A for tubes 3 and 4? Explain your response in terms of the processes responsible for the color changes and the organism(s) involved in each case.If tube 4 was placed in the dark for the duration of the experiment, predict the color of the contents of tube 4 at the end of the experiment. Explain your response.

Answered: Students are performing an experiment…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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What color should the contents of tubes 3 and 4 be at the end of the experiment? What is the reason for the colors that you predicted in Part A for tubes 3 and 4? Explain your response in terms of the processes responsible for the color changes and the organism(s) involved in each case. If tube 4 was placed in the dark for the duration of the experiment, predict the color of the contents of tube 4 at the end of the experiment. Explain your response.

Bromothymol blue (BTB) is a pH indicator that turns yellow in the presence of high levels of carbon dioxide (CO₂) in water. If BTB
yellow. If it has no CO₂, the solution with BTB will remain blue.
Possible colors of BTB depending of the amount of CO2 present:
Less CO₂
Color blue:
No CO₂, or very low
Color green:
Intermediate CO₂
More CO₂
Color yellow:
High CO₂
s added to a water solution that has high levels of CO₂ the solution will turn

Students are performing an experiment to understand the transfers of carbon between a photosynthetic organism, the aquatic plant Elodea, and a water snail. They are using test tubes that contain the
same amount of water, partially enriched in CO₂, and the same amount of BTB, to detect the presence of CO₂. The test tubes are placed in natural sunlight for the duration of the experiment, as shown in the
image. The contents of each test tube are as follows:
Tube 1 Tube 2
Tube 3 Tube 4
Tube
Tube 1
Tube 2
Tube 3
Tube 4
Contents
Water + BTB
Water+ BTB + 1 snail
Water+ BTB + 1 Elodea
Water+ BTB + 1 Elodea + 1 snail
What color should the contents of tubes 3 and 4 be at the end of the experiment?
What is the reason for the colors that you predicted in Part A for tubes 3 and 4? Explain your response in terms of the processes responsible for the color changes and the organism(s) involved in each case.
If tube 4 was placed in the dark for the duration of the experiment, predict the color of the contents of tube 4 at the end of the experiment. Explain your response.

Expert Solution

Step 1

BTB is a pH indicator, it is of blue colour and as the pH decreases or the solution becomes acidic due to an increase in CO₂ concentration it turns first green and then yellow.

Photosynthesis: it is a reduction process in which the CO₂ and H₂O are reduced to form glucose releasing O₂in presence of sunlight.

6CO₂ + 6H₂O ------> C₆H₁₂O₆+ O₂

Respiration : It's an oxidation reaction in which the glucose is oxidised to release energy and CO₂.

C₆H₁₂O₆+ O₂ --------> 6CO₂+ O₂+ Energy

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