Best answer: Why do the glass beads seem to be using oxygen?

What was the purpose of adding glass beads to some tubes in the experiment?

The vial with glass beads alone will permit detection of any changes in volume due to atmospheric pressure changes or temperature changes. As oxygen is used up by the respiring seeds, the gas pressure inside the respirometer will decrease and the water will flow into the pipet down its pressure gradient.

Why do germinating peas consume more oxygen?

Germinating peas consume more oxygen because they are growing and are more active than non-germinating peas. … Warmer temperatures allow for the peas to respire at a faster rate.

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

During respiration, oxygen will be consumed and its volume will be reduced to a solid. … The respirometer with just the glass beads served as a control, allowing changes in volume due to changes in atmospheric pressure and/or temperature.

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Do glass beads absorb co2?

The apparatus consists of two tubes, one containing the living organisms and the other with glass beads to act as a control. Both tubes contain an alkali such as sodium hydroxide to absorb any carbon dioxide given off during respiration.

What would happen if the respirometer were not tightly sealed?

If it hadn’t been tightly sealed, the air inside of the test tube would escape, causing the pressure of the oxygen to be impossible to be measured.

Why is Koh used in cellular respiration lab?

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.

Do dry seeds consume 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. —a series of reactions where energy is released from glucose, using oxygen.

How can you demonstrate quantitatively that germinating seeds consume oxygen?

In this exercise, a respirometer will be used to measure oxygen consumption. The instrument contains limewater and germinating seeds. As the seeds consume oxygen, carbon dioxide is excreted. The carbon dioxide is then absorbed by the limewater, creating a slight vacuum in the respirometer.

At which temperature did the peas consume the most oxygen?

This activity uses a number of controls. Identify at least three of the control, and describe the purpose of each control. The amount of oxygen consumed was greatest in germinating peas in warm water.

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Why do non-germinating peas consume less oxygen?

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.

Are non-germinating seeds dead?

Non-germinating seeds, however, are dormant and use very little respiration. Some respiration must occur in order for the seed to live. The rate of cellular respiration will be greater in germinating peas than in dry peas, and temperature will have a direct effect on this rate.

Which of the two pea types germinating or non-germinating consumes the most oxygen Why?

Germinating peas consume the most oxygen because they are active, unlike the nongerminating peas which are dormant/inactive. Since the germinating peas are active they need a lot of oxygen to continue doing cellular respiration.

Which of the peas used more oxygen?

The germinating peas used both more oxygen and more ATP. You just studied 10 terms!