Hypothesis:
If one-day pinto bean seedlings are soaked in a water solution, 1% NaCl solution, and 3% NaCl solution, the seedlings exposed to higher sodium concentrations will have decreased cellular respiration rates.
Treatments:
This experiment involved three treatments and a control. The goal of the experiment was to see how different levels of NaCl affect the rates of cellular respiration in day-old pinto bean seedlings. In this experiment the rate of cellular respiration was measured by the amount of CO2 in ppm per gram of substance produced by a given treatment group or the control over the course of ten minutes. CO2 levels were measured using a CO2 sensor. The sensor was given time to warm up then placed in a glass chamber with a sample from one of the treatment groups or a sample of control. CO2 levels in ppm were collected every four seconds for ten minutes by the sensor. The data was divided by the weight of the sample used to generate it, to give the respiration rate per gram of sample. The data was then graphed and the slope of the line of best fit for the data points was found. The slope of the line of best fit for each treatment was determined and represented
…show more content…
The line of best fit gives the respiration rate of day-old seedlings as the concentration of NaCl they are exposed to increases. As NaCl Concentration increases the rate of cellular respiration decreases by .108 ppm CO2/g per second. This overall decrease throughout the data further supports our hypothesis.
Discusion:
The data collected in the experiment does support our hypothesis. By examining the data as a whole a trend of decreased cellular respiration in seedlings soaked in solutions with increased NaCl concentrations. The water treatment which had a 0% NaCl concentration had a higher respiration rate than the seedlings soaked in the 3% NaCl concentration. This overall trend of the data supports the
“Children learn more from what you are than what you teach” (W.E.B DuBois). Children constantly gain knowledge from their parent’s actions and decisions. Mexican Whiteboy by Matt de la Peña, The Bean Trees by Barbara Kingsolver, and Two Kinds by Amy Tan all show different ways parents influence their child’s behavior and decisions. Throughout these three novels, parents are role models for their children through the examples they set, the way they treat them, and how they force them into situations. A child’s actions reflects the influence from their parents because they want to make their parents proud.
The statistics from Tables 1-3 we were able to find the amount of CO2 produced in mL for each mouse as seen in Table 4. These statistics
“Duckweed Recap” The duckweed lab was done to see the effects of road salt on the production of duckweed fronds. The purpose of this lab was to see if the salt concentration significantly affected the growth of the duckweed fronds. We had five different glass jar, one being a control with no salt in the water solution and four jars with different amounts of salt water concentrations and five ml of miracle grow in them. We started the experiment by putting four healthy and green duckweed plants with two fronds on each in every jar.
In Lisa Parkers “Snapping Beans”, there is a sense that there is a major difference in the speaker’s world, moreover than when she is with her grandmother. In lines 24-38 in Literature to go, the speaker talks about all the things she has experienced while at college. She doesn’t want to bring reality to what seems so unreal when she is with her grandmother. While she is sitting on the porch you can tell that everything is just content and peaceful. The speakers experiencing a few trials that are bringing her down in college, but she doesn’t want to make her grandmother upset with these things so she manages to hide her pain with lies.
A. Were the seeds in the “N” tube undergoing both photosynthesis and respiration, only photosynthesis, or only respiration? Use your results in Data Table 2 to support your answer. The seeds in test tube "N" underwent respiration. Respiration is always happening.
These findings show that the null hypothesis is rejected, and that there is a major difference between the observed and expected values. It is also observed that in the data in Figure 1.1, as the concentration of the NaHCO3 increases, the greater the production of oxygen. The highest photosynthetic rate is in at a 1.0% concentration of NaHCO3and the lowest in at a 0.1% concentration of NaHCO3. It is also important to note that the 0.4% concentration of NaHCO3 had a greater oxygen production than the 0.6% concentration of NaHCO3.
Introduction: In this task I will be researching the effect that acid rain has on the rate of plant growth. Acid rain is any type of precipitation with a high pH, with high levels of nitric acids. The reason why I had chosen this topic was because acid rain seems to have a great effect on the effect of plant growth, and plants play a very important role in our ecosystem. Acid rain is a major problem in our environment when we are not able to neutralize the acidity.
At 9:15am the students finished circle time and were sitting in their seats waiting for their snack to be served. As the assistant was giving lunch boxes to the students the teacher told the class about an experiment they were going to do. She told them they were going to stop sunlight from reaching their bean plant and that the class was going to predict what will happen to the bean plant. While the teacher was talking most of the students were not paying attention they were playing with their lunchboxes and talking to their classmates. Then the teacher began calling on students at each table and asking them what they predicted would happen to the plant without sun for three weeks.
Their was a correlation to the size of the bean and its life span. The smaller beans lasted longer and grew in population, compared to the larger ones that decayed in population. The reasoning for this is that the size of the bean affects how easy it is to pick up. This is shown in the table, the kidney beans the largest beans only lasted two generations, while the lentils the smallest beans finished with the largest population. Another factor was the texture of the beans.
The CO2 gas produced can be used as an indicator for the rate of reaction as the amount of CO2 gas that is collected with in a fixed time is proportional to the rate of reaction. Therefore, the average rate of reaction can be calculated by measuring the amount of CO2 collected for a set period of time. The rate expression of the reaction is written as: rate = k[CaCO3]a[HCl]b 1 http://www.nlm.nih.gov/medlineplus/druginfo/meds/a601032.html 2 http://www.thechemicalblog.co.uk/10-uses-of-hydrochloric-acid/ Page 2 of 7 k represents the rate constant, a and b signify the order of reaction with respect to the reactants. The order of the reaction is the power to which the concentration of that reactant is raised to, for example, doubling the concentration of a reactant that is first order would double the rate of reaction while doubling the concentration of a reactant that is in the second order would quadruple the rate of reaction.
Then, tests are performed to determine if the products of aerobic and anaerobic respiration are present in the flasks. The citric acid cycle consists of a series of chemical reactions used by all aerobic organisms to release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins into carbon dioxide and chemical energy in the form of ATP (Biology). The tests detect the presence of carbon dioxide and ethanol. Carbon dioxide should be present irrespective of the type of respiration taking place, but ethanol is present only if fermentation has occurred. Another factor that can indicate whether fermentation occurred or cellular respiration occurred is the amount of glucose utilized during incubation.
Research Question: How does the presence of light impact the rate of transpiration in plants? Aim: The aim of this experiment was to investigate how the presence of light affects the rate of transpiration in plants. Hypothesis: As light intensity increases, the rate of transpiration (water uptake) in a plant increases.
This suggests that as the temperature increased cellular respiration increased until it reached an optimal level somewhere between 400C to 600C. (Text book ref) BIOLOGICAL UNCERTAINITIES I bought the seeds two days before the experiment attempting to purchase seeds of the same age with almost identical sizes. However, even though I attempted to control the biological factors, some seeds germinated faster and at a better rate than others. The seeds that germinated better would also consequently give a higher rate of cellular respiration than the rest. I tried to correct this by choosing germinated seeds of almost similar visible size and also added in each respirometer the amount of dry/fresh seeds and beads that would equal to the total volume of germinating seeds and water in a graduated
This occurs due to two mechanisms: osmotic stress and ion toxicity. Osmotic stress occurs because saline soils have high osmotic potential, so plants which grow in saline soils have difficulty taking up water, resulting in low cell turgor and slow shoot growth. Ion toxicity occurs because saline water moves up the transpiration stream, causing Na+ and Cl- to accumulate
Introduction Plants are a major necessity in the balance of nature, people’s lives, and our terrain. We may not realize it, but plants are the ultimate source of food for almost 95% of the world population so says the National Group of Food. It’s a fact that over 7,000 species of plants are being consumed today. Plants are one of the reasons that we get clean water; as they help regulate the water cycle.