Why is it necessary to correct the readings of Respirometers with peas with the readings taken from Respirometers with glass beads?
Why is it necessary to correct the readings of the respirometers containing seeds with the readings tak... The glass beads will not respirate, making them the constant for the experiment so the data can be referred back to them.
Why is it necessary to correct the pea readings with the bean readings?
Why is it necessary to correct readings from the peas with the readings from the beads? To show the real rate of respiration in the peas, because we held the beads at a constant making them the control group for each trial.
Why is it necessary to correct the readings of the Respirometers containing seeds with the readings from the Respirometers containing only beads?
changes in the environment (e.g. in atmospheric pressure and temperature) affect the rate of respiration, so the readings are corrected to prevent the results from being inaccurate.
Why was it important to include the beads only respirometer in that experiment?
The purpose of the beads is to ensure that each respirometer is uniform in volume. The vial with glass beads alone will permit detection of any changes in volume due to atmospheric pressure changes or temperature changes.
Why is it important that there are an equal number of germinated and non germinated peas?
This is because germinating peas carried out a more rapid process of cellular respiration than the non-germinating peas. The beads carried out no cellular respiration. The non-germinating peas require less energy than the germinating peas so the dry peas carry out a slower process of cellular respiration.
Why does the volume of the peas matter?
Volume must be controlled because since volume and pressure are inversely proportional, meaning that as one goes up the other goes down, if the volumes for the germinated peas and the non-germinated peas was different, the pressure being measured by the LabPro wouldn't be as strong for the one with a lesser volume, ...
Which of the Respirometers serves as control explain your answer?
Which respirometer serves as the control? A: The beads serve as the control because they are not alive.
What is being consumed by the PEA in order for the water to move into the pipet?
While the peas underwent cellular respiration, they consumed oxygen and released carbon dioxide. The carbon dioxide reacted with the KOH resulting in a decrease in the volume of gas in the pipette and the vial. Because the pipette tip was exposed to the water bath, water moved into the pipette.
Why did water move into the Respirometers pipettes?
Explain why water moved into the respirometers' pipettes. Water moved into the respirometer's pipettes because pressure decreased when the amount of oxygen was decreased. 14. Design an experiment to examine the rates of cellular respiration in peas that have been germinating for 0, 24, 48, and 72 hours.
Why do germinating peas need to do aerobic respiration versus just using photosynthesis for their energy needs?
The food stored in the seed provides the pea plant cells with the energy they need to maintain themselves and divide, since the plant is not yet capturing sunlight through photosynthesis. The pea plant cells depend on cellular respiration to furnish them with the energy they need to stay alive and grow.
Why did you use KOH pellets of KOH solution while performing the respiratory experiment?
Potassium hydroxide is used in the experiment for the absorption of CO2 from the plant released during respiration. When KOH absorbs CO2, it creates a vacuum in the flask. The air present in the bent glass tube moves into the conical flask. This pulls the water in the bent tube further up.
What product of fermentation cellular respiration is being measured via the Respirometers when measuring the volume of liquid left in each small test tube?
Explanation: The respirometer bubble height measures the amount of carbon dioxide produced during fermentation.
Why are the beads in peas used as a control variable?
to show the actual rate at which cellular respiration occurs in the peas; the beads were the control variable. changes in the environment (e.g. in atmospheric pressure and temperature) affect the rate of respiration, so the readings are corrected to prevent the results from being inaccurate.
Why would respiration be higher at 10°C?
respiration would be higher at 10°C because the animal would have to keep up its body temperature and remain in a state of homeostasis; the small mammal would essentially be producing more ATP in order to keep its body temperature up. not much respiration would be needed at 25°C because it is already warmer and there isn't as much of a temperature regulation needed.
What is the purpose of the beads in the peas?
To show the actual rate at which cellular respiration occurs in the peas. The beads were the control variable.
Why did the stopper on a vial have to be sealed?
The stopper at the top of the vial had to be completely sealed so that no gas could leak out of the vial and so that no water would be able to enter into the vial.
Why would respiration be higher at 21 degrees?
Respiration would be higher at 21 degrees because the animal would have to keep his body temperature up.
Do peas need oxygen?
The amount of oxygen consumed was greatest in germinating peas in warm water. The oxygen consumption increased over time in germinating peas.
Why is it necessary to correct the readings from the peas with the readings from the beads?
Why is it necessary to correct the readings from the peas with the readings from the beads? This is necessary to show the actual rate at which cellular respiration occurs in peas. The beads served as a control variable.
Why did the vial have to be completely sealed under the stopper?
Why did the vial have to be completely sealed under the stopper? The stopper at the top of the vial had to be completely sealed so that no gas could leak out of the vial and no water would be allowed into the vial.
How does germination affect pea seed respiration?
The germinating seeds have a higher metabolic rate and needed more oxygen for growth and survival. The non-germinating peas, though alive, needed to consume far less oxygen for continued subsistence.
Why did the vial have to be completely sealed under the stopper?
Why did the vial have to be completely sealed under the stopper? The stopper at the top of the vial had to be completely sealed so that no gas could leak out of the vial and no water would be allowed into the vial.
How to assemble a respirometer?
Assemble the six respirometers by obtaining 6 vials, each with an attached stopper and pipette. Then place a small wad of absorbent cotton in the bottom of each vial and , using the pipette or syringe, saturate the cotton with 15 % KOH. Be sure not to get the KOH on the sides of the respirometer. Then place a small wad of non-absorbent cotton on top of the KOH-soaked absorbent cotton. Repeat these steps to make the other five respirometers. It is important to use about the same amount of cotton and KOH in each vial.
How long to equilibrate respirometer?
Allow the respirometers to equilibrate for three more minutes and then record the initial water reading in each pipette at time 0. Check the temperature in both baths and record the data. Every five minutes for 20 minutes take readings of the water’s position in each pipette, and record.
Why would respiration be higher at 21 degrees?
Respiration would be higher at 21 degrees because it would be necessary for the animal to maintain a higher body temperature. The results would proliferate at 10 degrees because the mammal would be required to retain its body temperature at an even lower temperature in comparison to room temperature.
