How were the beads used in the lab?

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 was the purpose of the beads?

A bead is a small decorative piece that is used for creating necklaces, bracelets and an assortment of decorative gowns/ attire. They can be found in a multitude of sizes (1mm- 1cm) and have adorned the human body for thousands of years as jewelry – the oldest dating back 100,000 years.

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What role was played by the tube that contained only glass beads in this experiment?

Cards In This Set

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What role was played by KOH in the soybean experiment? Absorbtion
In the germinating seed experiment, what do you call the tube that contains only glass beads? Thermobarometer

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.

Why is it important that the peas be kept in the dark prior to placing the seeds in the respirometer?

For peas to germinate, they need a dark, warm environment after soaking in water. Cellular respiration is a metabolic process. Eventually, catabolic reactions are used to break down an organic molecule to release energy.

What is the purpose of the glass beads in the cellular respiration lab?

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 were the first uses of beads?

Beads represent some of the earliest forms of jewellery, with a pair of beads made from Nassarius sea snail shells dating to approximately 100,000 years ago thought to be the earliest known example. Beadwork is the art or craft of making things with beads.

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Why was it important to use the beads only reading as correction factors?

Why is it necessary to correct the readings from the peas with the readings from the beads? The gas changes in the beads were only due to pressure and temperature, and not gas consumption, so the beads act as a control. … Germinating peas consumed more oxygen than non-germinating. 8.

What is the purpose of the beads in the tube with 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. This in turn caused less oxygen to be consumed in the vials with non-germinating peas than the vials with germinating peas.

Why is it necessary to correct the readings of Respirometers containing only 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 are glass beads used in tube 3 quizlet?

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.

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.

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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 vial have to be completely sealed around the stopper?

The vial needed to be completely sealed around the stopper because it insured that the measurement of the pressure in the test tube to be accurate. 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.

How are the germinating peas obtaining energy?

The germinating peas will produce the most heat. Peas will carry out respiration to release the energy needed for growth and heat energy is produced as it is an exothermic reaction. The peas are also covered in microbes which also respire producing heat.

Why do we use germinating seeds in the 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.