For lab six, the class was given the task to come up with any experiment using the material given on the overhead. The question my group was trying to test was, does a variation in solution affect the growth or production of duckweed? Duck weeds are one type of plant that has the ability to eliminate nitrogen and phosphate out of fresh water. This is called phytoremediation (Bunnell 84). Since humans use other organism to clean up environmental contamination, we would call this bioremediation. Duckweed can also be used as a natural wastewater system treatment method, which is ideal for developing countries (Nhapi 2004). Duckweed based ponds in combination with pre-treatment may be a feasible option for organic matter and nutrient removal …show more content…
Duckweed is a very reliable organism and can be used in many positive ways in many ecosystems. Nutrients levels are very important and should be calculated in order to determine the right amount for plant growth. According to other studies, the overstimulation of phosphorus leads to complete dominance of duckweed and disappearance of plant growth (Liere 2007). The purpose of placing the duckweed into the nitrogen and phosphate solution, is to see how well duckweed is at phytoremediation. In this case, we are trying to test the same results along with high nitrogen levels. If duckweed is proficient at doing so, then the production and growth of duckweed would fluctuate instead of decline. Based on the high levels of nitrogen and phosphorous, our group’s hypothesis was that duckweed growth would prosper and …show more content…
Following directions, paying attention, and being careful were the harder tasks. Before one starts any experiment, it is important to always be cautious and use safety first. Even though Professor Demor gave each of the eleven groups an opportunity to create their own experiment, there were specific rules each of us were still required to follow. Each group was required to use a minimum of ten duckweed plants. We were also required to use a maximum of 50 ml of solution of our choice. Lastly, professor gave us a maximum of nine cups for replication. We did not have to use all nine, it was up to us. Every group was different, but this is what our group experimented. Our group decided to see what effect high phosphate and nitrogen levels had on the growth of duckweed. The phosphate level was 100 ppm and the nitrogen level was 1760 ppm. As a group we set up three replicas cups with 50 ml of solution and one cup with 50 ml of regular pond water. After filling the cups with the right amount of solution, we took the duckweed out of the original container, using a _________ and placed it into the proper cups. In order to see a major difference amongst duckweed growth, we used 10 duckweed plants per cup, most having only 1-3 fronds. After that, we labeled the cups properly. To stop contamination, all cups were covered with plastic wrap and was securely held down with a rubber band. Lastly, once everyone finished, we were asked to place
Planarians are free-living, carnivorous flatworms found in the Phylum Platyhelminthes, Class Turbellaria. Although the Phylum Platyhelminthes is known for having the animals with the most parasitic species, the class Turbellaria which consist of the Planaria, are a non-parasitic species. Platyhelminthes which translates to "flat worm" are triploblastic animals. This means that they have three tissue layers, the endoderm, mesoderm, and ectoderm. Planaria also are monoecious organisms, meaning that they have both female and male sex organs in one organism. Another characteristic of the Planaria is that they do not have a true body cavity, meaning that they are acoelomate organisms.
The objective of this experiment is to determine which of three weed kill methods will be most successful in killing the Cobblers peg weed over a five day period. Two of the weed kill methods are natural - boiling water and vinegar solution. One of the weed kill methods is a weed spray Yates ZERO.
Many variations and species of plants can be found all around the world and in different habitats. These variations and characteristics are due to their adaptations to the natural habitat surrounding them. In three of many climatic zones, the arid, tropical and temperate zone, plants that vary greatly from each other are found in these locations. In this experiment, we’ll be observing the connection between the adaptations of the plants to their environment at the Fullerton Arboretum. The arboretum is a space containing numerous plants from different environments. The plants are carefully looked after and organized into their specific habitat. Therefore, we’ll be able to take a look at the plants within multiple
the replicate shows the same trend as the first experiment. I used a measuring cylinder and a beaker to measure out the amounts of water; however these did not seem to affect the quality of my results. To increase the accuracy of my results I could have perhaps used a burette. Even though I did the best I could to keep the experiment accurate, I did. some places there were mistakes that unintentionally occurred.
This report is on a virtual experiment based on the real-life experiment accomplished by John Endler and David Reznick of the University of California. The goal is attempting to determine whether or not the level of predation effect’s the color patterns of guppies.
The fast plant seeds were planted in a terrarium and a variable was added to see what happened when the variable was added to compare the regular growth of plants without and with the variable. There was a land part of the terrarium where the fast plant seeds were planted and a bottom part where there was water which was to water the plants through a rope. The plants without the variable grew pretty quickly and almost always grew up. The one time their average dropped was because one of the plants’ necks got snapped which dropped the plant from 13.5cm to 10 cm causing the average to drop from 11.3cm to 10.5cm. The fast plants grew pretty steadily and the final average height was 19.5 cm. The variable that got put into the
Common duckweed is a very small light green free-floating, seed bearing plant. Duckweed has 1 to 3 leaves, or fronds, of 1/16 to 1/8 inch in length. A single root (or root-hair) protrudes from each frond. Duckweeds tend to grow in dense colonies in quiet water, undisturbed by wave action. A lot of the time more than one species of duckweed will be growing together in these colonies. Duckweeds can be aggressive invaders of ponds and are often found mixed in with mosquito fern or water meal. If colonies cover the surface of the water, then oxygen depletions can kill fish. These plants should be controlled
Out of the 12 water tests conducted along different sides of the lake, there seemed to be a great concentration of nitrate and phosphate near the City of Jaffrey, the main water treatment facility, and the side of the farmland with West Side Park. As stated before, the local limit for the concentration of phosphate is 0.1 ppm. Phosphate levels in the parts of Jaffrey Lake near the farm and city were tested to range from 0.5 to over 2.5 ppm. That is 5 to 25 times more than the limit! On the other hand, nitrate was also tested to have 25 ppm in these same areas. That is more than twice the local limit. At every other side of the lake, phosphate levels were within the local limit at 0 to 0.19 ppm. Nitrate was also below the limit at 2 to 4.9 ppm across the lake. This shows that there are specific areas of
An example of this was with some seeds not growing. I felt like our error was that we over watered our seeds, causing some of them to drown, and to not grow properly. In order to fix this error in future experiments, we would need to drop the water within a flask to measure it, or to have a set amount of water to give to the seeds. Another error present in our experiment was improper spacing of the seedlings. In our experiment, our seedlings were very close to each other, and they were probably too close to grow out a stem. In order to fix this, it would be better to place seedlings within the petri dish one by one or a couple at a time. This would reduce the clumping of seeds, and could allow seedlings to grow their stem properly instead of getting stuck in a small place. A couple ideas for further experiments could be to see how far an albino seed can grow in light conditions. Since they have no chlorophyll present, I feel like it would be interesting to see if it would even grow properly since it can't go through photosynthesis. To add on to that, another experiment test if the seed with chlorophyll grows faster since it goes through photosynthesis. It could test to see if photosynthesis really speeds up the growth of a
Japanese Knotweed is a bamboo-like plant. It tends to grow in large clusters and can spread rather quickly. This plant is not native to the United States, and sadly, it is beginning to take over.
One of the themes that Milkweed expresses throughout the plot line is survival. All the main characters in the book had to do certain things in order to survive. For example, Uri tells Misha -who at the time had no name- to “take only what he needs.” This shows that Uri really does care about Misha survival. The other skills the boys used were remaining invisible, stealing food, using a rug to keep warm, and drinking bomb crater water. If I lived in the time of World War II, in the city of Warsaw, I would probably use the skills the boys used to survive. My family would be priority, so I would make sure to steal more for each member; however, if one of my family members was dying, I probably wouldn’t try to save them because if we were to get
Two members of the group were instructed to visit the laboratory each day of the experiment to water and measure the plants (Handout 1). The measurements that were preformed were to be precise and accurate by the group by organizing a standardized way to measure the plants. The plants were measured from the level of the soil, which was flat throughout all the cups, to the tip of the apical meristems. The leaves were not considered. The watering of the plants took place nearly everyday, except for the times the lab was closed. Respective of cup label, the appropriate drop of solution was added to the plant, at the very tip of the apical meristems.
Describe the experiment. What is the most important thing you learned from this experiment? Provide an example (from the experiment to explain your answer).
We used wheatgrass were 40 wheatgrass seeds, two empty pots, soil, and water. We first added soil for both pots and 20 wheatgrass seeds in each pot. My partner and I decided that we label pot one experiment which is “sugar and water” and pot two control which is “water” only. The experiment was for almost four weeks we had to make sure both get the same room temperature and water, so we can see the results after this amount of time. Both pots had same room temperature so both can have the same amount of sunlight also, the same amount of water which is a glass of water from the sink once a week. In the experiment pot we added a glass of water with one teaspoon of sugar and the control pot glass of water. Every week we used to see both pots grow almost the same. At the end of the experiment, my partner and I measured the length for both plants and we recorded the average for each plant, so we can know the rate of growth
There is also the potential of human error within this experiment for example finding the meniscus is important to get an accurate amount using the graduated pipettes and burettes. There is a possibility that at one point in the experiment a chemical was measured inaccurately affecting the results. To resolve this, the experiment should have been repeated three times.