The Effects of Snails and Elodea in Water on Carbon Dioxide Levels

At five minute intervals over the next fifteen minute period, record the color intensity of the solution of each test tube.

Our data recorded shows that the germinating peas did consume more oxygen than the non-germinating or the glass beads alone and that the cooler temperature did slow down the consumption of oxygen in the germinating peas. In both water baths the atmospheric pressure seemed to increase causing our reading to raise in our glass beads and non-germinating peas. This direct relationship in reading leads us to believe that the oxygen consumption in the non-germinating peas was minimal if any at all.

When the tip of the rod touched the pH paper, the color of the pH paper became blue.

The null hypothesis will be that the test tubes with an increase in temperature, pH values, enzyme concentrations, and substrate concentration will have a very small color change or no color change at all. The alternate hypothesis is that the test tubes containing an increase in temperature, pH values, enzyme concentrations, and substrate concentration will all have an intense color change; the more the change, the more intense the color change will be.

To performed the experiment, a volumeter was set up to measure the net oxygen production under white light, then a second step was followed to measure oxygen consumption under dark conditions (oxygen production only happens in the presence of light and oxygen consumption in the presence of dark light) and finally, a third step consisted of recording the measure of the net oxygen production under the presence of green light.

This test is used to detect if the bacteria contains any deoxyribonuclease activity. Because no color change was observed from blue to clear my unknown bacteria displayed a negative result.

The purpose of this experiment was to observe the light that the Tomopteris emits. They collected Tomopteris from Monterey Bay off the coast of California. They then stimulated the Tomopteris to produce light so that they could observe the light that it produced. The researchers took photos and measured the amount of light that was emitted per Tomopteris. One interesting discovery was a Tomopteris that emits a blue light which is rare since most Tomopteris emit a yellow-orange light. The researchers tried to create explanations as to why this Tomopteris emits blue light. They think that “different protein complements may be responsible for the light in different species”. However, this isn’t their only explanation for this rare blue emitting Tomopteris. The other explanation is that “this could potentially reflect different ecological roles of the two light colors”. Researchers concluded that with further testing the blue-light emitting Tomopteris may be considered a species of their own.

When using algae beads and a CO2 indicator, the process of Photosynthesis and Cellular Respiration can be measured. In this experiment the intensity of light will be altered in each trail, and the rate of Photosynthesis will then be measured. As you rise from low light intensity to higher light intensity, the rate of photosynthesis will increase because there is more light available to drive the reactions of photosynthesis. However, once the light intensity gets high enough, the rate won’t increase anymore since there will be more-light than water and CO2; there will not be enough components from light, water, and CO2 to create the process of Photosynthesis. As CO2 dissolves and the amount of CO2 goes up, the pH will lower, which means the solutions color will change varying form red, orange and yellow, all pending on what the pH is at. CO2 will be produced from respiration, all while photosynthesis absorbs the CO2. This means that when the rate of photosynthesis is less than respiration, pH levels will decrease, and CO2 concentration will increase. Vis versa, when pH levels increase

The rate of photosynthesis can be determined different ways. Because oxygen is a product of photosynthesis and the Elodea plant is submerged in water, the oxygen is released in bubbles that rise to the surface of the water in the beaker. In this experiment, the rate of photosynthesis for each degree of light intensity can be measured by counting the number of bubbles released every 30 seconds for five minutes at each distance. The rate is the number of bubbles released per minute.

In this Lab, the amount of Carbon Dioxide produced will be the highest in the germinating seeds, because they are undergoing the highest amount of cellular respiration, as they need energy for growth; the same reason why the non-germinating pea will have the lowest amount of Carbon Dioxide. The amount of Oxygen consumed by the cold germinating peas will be substantially less, as when the temperature decreases, so does the amount of kinetic energy, so the molecules function slower.

Throughout the experiment, the color of the solution remained colorless. At first, the temperature jumped to 60°C and the liquid of the lower boiling point started to evaporate, condense, and collect in the Falcon tube. Through the first and second receiving tube, the temperature stayed constant at 60°C. However, once I switched to the third receiving tube, the

For this experiment, the researcher built upon prior knowledge from past experiments. The researcher had observed bioluminescent and fluorescent organisms in their natural habitat. The researcher then wondered how the altering of the dinoflagellate circadian rhythm would affect the brightness and duration of their glow. The researcher then created the following hypothesis, “If the dinoflagellate Pyrocystis lunula is taken off of its 12/12 light/dark cycle circadian rhythm and subjected to 18/6 and 6/18 hour light/dark cycles then the duration and intensity of its bioluminescence will decrease.”

transported. A second trial was to be run after this experiment but the snails died before the

After the 30 minutes, the color was observed and recorded on the data sheet. The dialysis tubing was removed from the beaker and a small slice was made, we then used a glucose indicator strip to test for the presence of glucose, along with the solution in the beaker. The results were then recorded in table 1on the data sheet.

QUESTION 10 Figure 1 demonstrates the patterns of oxygen used by different organisms incubated for 24 hours in tubes of a nutrient broth.