Effects Of Low Nitrate And Low Phosphate In Duckweed Water

The average population count for duckweed in the treatment groups was lower than that in the control groups for each day data was recorded (Table 1). By day fourteen, the average population size of the control group reached 307 individuals, nearly twice that of the treatment group (Table 1).

I filled three clear cups, the first one with dH2O, the second with 0.1% NaHCO3 solution (equal parts 0.2% NaHCO3 and dH2O), and the third with 0.2% NaHCO3 solution. The control of the experiment is the cup with dH2O. The independent variable is time and the dependent variable is the number of disks floating in the solution. We separated the 30 disks into three groups of 10, placed them in syringes filled with a corresponding solution (either dH2O, 0.1% NaHCO3, or 0.2% NaHCO3), and removed all air from the syringe. This causes photosynthesis to stop in the disks, which then causes the disks to not float any longer. The three groups of disks were placed in each cup filled with 100mL corresponding to the solution, then placed under a light source and started a timer. For each minute in 15 minutes, data regarding the number of disks that floated to the top of each

Week three the daphnia are tested under different concentrations of an herb to see if the herb causes any types of stress on the variable. All of the same methods are done as in week one and two except in preparing the herbal solutions. To prepare the herbal solution the herb needs to be grinded mixed with methanol and left to sit for a few minutes so it can react and separate the important contents of the herb out. In large clear wells the mixture is measured in microliters of 500, 50 and 5, we also measure out 500 of methanol and all of these are left to dry out. Then 5ml of water is added to 5 wells the four

To start off the experiment 25mL of water was placed into a labeled beaker and tested for the pH using pH test strips. Next the antacid tablet was placed in the solution and timed for how long it took to dissolve the tablet. Finally the temperature was measured. This same process was repeated for the acidic solution, and finally for the basic solution. After each experiment the pH, the reaction time, and the temperature of the beaker were recorded into a table. For this experiment the independent variable was the substance used (acid, neutral or base), and the dependent variable was the reaction time of each substance. The constant conditions of this experiment included the amount of substance being used, and the placing of one antacid tablet into each beaker. The experimental group was the acidic and basic solution, and the control group was the neutral

If I had lived during the Holocaust, the hardships would include lack of shelter, starvation, and survival. To start, people struggled to find a safe shelter. The book Milkweed is about a boy who has to change the locations of his shelter to be able to survive. I know that during this time period a lot of people who were jewish were taken to concentration camps were they were forced to work and were treated harshly. Because of this people had to change the location of their shelter to escape getting caught. Additionally, people also had to face the struggles of starvation. Since hitler and his nazis were killing off a lot of people, the people who owned food stores could no longer sell food. This meant that people couldn’t get the same amount

The control used in the experiment was water. For each trial we set up, it was to see the results between our assigned extract and water. This was useful in interpreting our results because our results were based on how the insects responded. If they had no preference to either strip, attraction to the plant extract, or if they

The group planted a total of 8 separate pots of seeds. Two pots consisted of only seeds and those were the control group of this experiment. The other plants also consisted of radish seeds but had chemicals ammonia, vinegar, or a combination of both applied once weekly with 30ml of water being applied daily (except on the weekends). As a result, there were a total of 8 pots. Two of each variable and two of the controls.

2) Test the isopods response to moisture in experiment one and their response to other variables assigned to each group in experiment two. The overall purpose was to find out which environment the pill bugs preferred. For the first part of this experiment I believe that when isopods are exposed to either wet or dry conditions, they will prefer to live in moist conditions. And for the second experiment (in my groups case) I believe that when pill bugs are exposed to environments with food and environments with no food, they will prefer environments with

Today with my group lab we had to discuss on how to design an experiment that investigated the two herbicides DCMU and DCPIP. We used Elodea leaf and Elodea is basically a genus of aquatic plants often called the waterweeds and can be found anywhere in a pond or under water. So we started by creating a solution of phenol red, by adding 5 drops of concentrated phenol red to 40mL of water, then one of our group member used a straw to gently blow air into the solution until it reaches a neutral pH. We then transferred the solution into two test tubes evenly and labeled each tube dark and light, meaning the dark one will stay in the dark and the light one will stay under light bulbs. We predicted that dark one will stay the same and the light

milkweed within its body and by eating the leaf in a circle it stops the thick liquid inside from coming out and overwhelming it.

In 1992, an amendment was made to the Clean Air Act in the US, aimed at reducing the

The procedures start off with floating 50 duckweed leaves on the surface of a container filled with 10 liters of water. This process was repeated three more times. 5 mL of 1-1-1 fertilizer was added to one container, while 5 mL of 3-1-1 fertilizer was added to the second container, and 5 mL of 5-1-1 fertilizer to the third container. The last container was left alone as it was the control group. Once every week on the same day for five weeks, 5 mL of each type of fertilizer was added to their corresponding containers.

Aquatic plants are an important component of lake systems. These plants may be totally submerged beneath the lake surface, floating, or growing along the shoreline. They provide food and shelter for bugs, fish and other organisms, prevent shoreline erosion, filter pollutants from adjacent shoreline activities, and provide oxygen to the surrounding environment.

In first half of the experiment, we tested 5 different compounds which one could work as an inhibitor. When using a 5-ml pipette with a green pump, we placed 5 ml of distilled water in each small labeled test tube. After that, we went to place 8 drops of potato extract, 8 drops of catechol, drops of an inhibitor, and then drops of distilled water. The only concentration that we had alternated in the experiment would be the drops of catechol and drops of distilled water. In tube 1, we placed 8 drops of catechol with 8 drops of distilled water in the tube, containing NO potato extract. In tube 2, we placed 8 drops of catechol, NO distilled water, and 8 drops of potato extract. In tube 3, we placed NO drops of catechol, 8 drops of

Water was collected using a Wan Dorn Bottle (Lab Manual). There were approximately 20 students that collected samples from the deepest part of the lake, and 20 students that collected samples from the shallowest part of the lake. The shallower portion of the lake was closest to a golf course and floating vegetation (Lab Manual). Five water collections were made at each location. From the deep part of the lake, each of the five samples was taken at 1m; from the shallower part of the lake, each of the five samples was taken at a 0.5m depth (Lab Manual). These water samples were collected into 5 separate bottles, each labeled one through five. Bottle one had water nearest the surface, whereas bottle five had water collected deeper in the lake. Bottles two through four were intermediate levels of one and five. We used the water in the bottles labeled 1, 2, 3, 4, and 5, to detect the temperature and test the pH of the water samples from the various depths of both locations. Water from the labeled bottles 1, 3, and 5 were put into bottles labeled N1, N3, and N5, and were brought back to the lab to analyze their nutrient content (Lab