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What is the purpose of the glass beads in the control tube?

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 was it necessary to correct the readings from the seeds with 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. Explain the effects of germination versus non-germination on peas seed respiration.

What is the purpose of the beads in the tube with non germinating peas?

The beads served as a control variable, therefore, the beads experienced no change in gas volume. Explain the effects of germination (versus non-germination) on pea seed respiration. The germinating seeds have a higher metabolic rate and needed more oxygen for growth and survival.

What do white beads symbolize?

The people of southern Africa are known to wear beads around their neckline, representing the symbol to assist the spirits. … Since white dresses are a reflection to purity and cleanliness, wearing white beads also promotes sincerity, honesty, purity and cleanliness.

What was the purpose of adding KOH to the cotton balls in the Respirometers?

Oxygen is being consumed and carbon dioxide is diffusing out of the cells and released. The respirometer must try to measure both gases at the same time. In order to accomplish this, Potassium Hydroxide (KOH) is added to the device. KOH absorbs carbon dioxide and forms Potassium Carbonate and water.

What is the purpose of KOH pellets in this experiment?

When water level rises in the tube, it indicates that carbon dioxide is produced by germinating seeds.So, the role of KOH here is that it absorbs the carbon dioxide gas which creates a vacuum in conical flask and finally pulls the water in the bent tube which proves respiration in plants.

What is germinating and Nongerminating?

Germination is the growth processes of a seed. It requires a lot of energy to break the seed coat and as it continues to grow this energy need increases. … Non-germinating seeds, however, are dormant and use very little respiration. Some respiration must occur in order for the seed to live.

Which Respirometers in this experiment are the negative controls Why?

Which respirometers in this experiment are the negative controls? … The respirometers with the distillled water instead of the glucose because the yeast had nothing to ferment so it was the control.

Why did the non-germinating Respirometer show gas consumption?

The non-germinating peas shows hardly any consumption of oxygen. Since the germinating peas are germinating or sprouting, they require a more extensive amount of energy or ATP. This allows them to have high oxygen consumption rates or respiration rates in this experiment.

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What was the purpose of the potassium hydroxide KOH in the Respirometer experiment?

Potassium hydroxide (KOH) was added to the respirometer to absorb the CO2. If the KOH was not added to the respirometer, the volume of gas in the respirometer would not change (one O2 molecule is consumed for every one CO2 molecule released as a product of cellular respiration).

Why is it necessary to correct the readings of the Respirometer containing seeds with the readings taken from Respirometer containing only glass 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.

What is the effect of germination on pea seed respiration?

The affect of germination on the rate of cell respiration in peas is that in peas that are germinated, the rate of cell respiration is higher because the cells are growing/going through mitosis which requires energy/ATP in order to be carried out which is generated through the process of cellular respiration.

How does the number of seeds in the chamber affect the rate of respiration?

Seed size is a factor that affects the germination process and the rate of respiration. In general, our data exhibited that as seed size increased, the rate of increase in carbon dioxide in the chamber increased thus exhibiting that respiration occurred in higher volume and germination was favorably affected.

What do the colors of beads mean?

Color meanings Blue: healing, harmony, insight, truth. Brown: earth, stability. Green: prosperity, fertility, abundance, hope, healing. Purple: spirituality, wisdom, royalty. Red: vitality, passion, bravery, confidence.

What do pink beads mean?

Pink – Care, beauty, love and kindness. Purple – Royalty, spirituality and wisdom.

What is the meaning of red and white beads?

The red beads symbolise life and the ability to transform into warriors. The white, separating the red, act as a neutraliser to passions often inflamed when the warrior spirit is awakened. … A history of a people is written in these beads worn simple, delicate, unobtrusive and undistracting.

What is the role of KOH in this experiment quizlet?

The role of KOH is to absorb CO2. If the bean seeds are germinating they should be using oxygen and releasing carbon dioxide.

What is the role of KOH in the experiment with germinating and non germinating soybeans?

a. KOH Takes up carbon dioxide given off by cellular respiration. … The carbon dioxide given off in vial 1 will obscure the uptake of oxygen in that vial. Soybeans don’t move as animals do.

How does KOH affect the water movement in the Respirometer?

How did the KOH affect the water movement in the respirometer? It allows more water into the pipette.

Which of the Respirometers serves as control explain your answer?

4. Which respirometer serves as the control? A: The beads serve as the control because they are not alive.

Why were the Respirometers submerged in a water bath during this experiment?

Why has water moved into the respirometer pipettes? … the water moved into the pipette because the vial and pipette were completely submerged into the bath. Conclusion of Lab. Rate of cellular repsiration is greater in germinating peas than in non-germinating peas.

What is a negative control for an experiment?

Negative controls are particular samples included in the experiment that are treated the same as all the other samples but are not expected to change due to any variable in the experiment. … The proper selection and use of controls ensures that experimental results are valid and saves valuable time.

Why do germinating seeds use more oxygen?

Oxygen. Seeds need oxygen so that they can produce energy for germination and growth. The embryo gets energy by breaking down its food stores. Like all organisms, this is done through a process known as aerobic respiration.

Why do germinating peas produce more co2?

As oxygen is consumed to provide energy, germinating seeds release carbon dioxide.

Why are polyester fluffs used in the experiment?

Why are Polyester fluffs used in this experiment? will not soak up KOH and can be used as a barrier between KOH and seeds. Which side of the red respirometer marker do you measure from?

How does germination affect cellular respiration?

The start of germination places substantial energy demands on the seed as plant growth processes take shape. As a result, cellular respiration rates increase to accommodate the cell-building activities required to break open the seed and produce the initial root and stem structures.

What is the purpose of the cellular respiration lab?

Compare the rates of cellular respiration of different organisms OR investigate an environmental factor on rate of cellular respiration. Calculate the rate of reaction of cellular respiration for different organisms and use this data to explain what is occurring at the cellular level.

Do dormant seeds perform cellular respiration?

To fulfill the high-energy needs of a germinating seedling, cellular respiration increases as a seed emerges from dormancy and begins germinating. However, seeds respire at a lower rate throughout dormancy.

Why is a control respirometer necessary for an experiment meant to measure the rate of respiration by monitoring oxygen consumption?

Measuring the rate of cellular respiration can either rely on measuring the amount of oxygen taken in, or the amount of carbon dioxide being released. … This allows the respirometer to measure only one variable, the consumption of oxygen gas by living cells.

Why keeping the same volume of peas germinated and dried and glass beads is important?

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. This in turn caused less oxygen to be consumed in the vials with non-germinating peas than the vials with germinating peas.