Why do you need to add glass beads to the Respirometer containing the dormant seeds?

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 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.

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.

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Do glass beads or growing seeds respire hypothesis?

As oxygen is consumed to provide energy, germinating seeds release carbon dioxide. … HYPOTHESES: The experimental hypothesis is that germinating seeds will show a greater rate of respiration than control glass beads. Additionally, that at higher temperatures, the rate of cellular respiration in the seeds will increase.

What might account for slight volume changes in the Respirometer with the beads only?

Any change in volume in vial with glass beads alone will be due to atmospheric pressure changes or temperature changes.

What was the purpose of using the glass beads?

Why use glass beads in this experiment? We used glass beads as a control. The main purpose was to see if there were any other factors affecting the experiment other than the variable being tested.

Why were glass beads added to this 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.

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.

What corrected difference?

Corrected Difference = Difference of Germinating Peas – Difference of Beads Alone. OR. = Difference of Dry Peas/Beads – Difference of Beads Alone. Do these calculations and fill in your data tables. You do not need to show your work.

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What organelle do you need to do cellular respiration?

Mitochondria have an important role in cellular respiration through the production of ATP, using chemical energy found in glucose and other nutrients.

Do dormant seeds respire?

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 did we use germinating seeds in this experiment?

Germinating seeds are used in the experiment of the release of carbon dioxide during respiration because they respire a lot more than a plant that has already grown. A new plant will require more energy and oxygen to get started. … Germinating seeds are active as well.

What is the difference between seed dormancy and germination?

Seed dormancy is the state in which seed is unable to germinate, even under ideal growing conditions (Merriam-Webster). Because dormancy can be broken by most ideal growing conditions (different and specific for each species), the seeds germinate when they are the most likely to flourish.

How did the respirometer with glass beads act as a control?

The result was a decrease in gas volume within the tube, and a related decrease in pressure in the tube. The respirometer with just the glass beads served as a control, allowing changes in volume due to changes in atmospheric pressure and/or temperature.

Why is Koh added to the respirometer?

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.

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What is the purpose of adding the KOH to the cotton ball?

One wad of cotton is absorbent and has 10 µl of 15% KOH; the other is non-absorbent and serves to protect the living organism from the corrosive KOH. The device is able to measure respiration because the carbon dioxide gas in the chamber is converted to a solid by the KOH.