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- One of the most significant sources of thepollutants that contribute to photochemicalsmog is exhaust from automobiles. Hydrogencell cars run on hydrogen and electricityand emit only water. Do you think thatthe government should provide strongincentives, such as tax breaks, for peoplewho pay extra for these cars?State the null and alternative hypotheses, specify the test being used (i.e. two-tail independent Student’s t-test), report the results of the test (include the test statistic, p value, and whether or not you reject the null hypothesis), and relate your findings back to the questions being asked. Seven tomato plants were treated with chlorogenic acid (and seven control plants were not treated) to determine if this acid influences the activity of the enzyme o-diphenol oxidase in their leaves. The enzyme activity data are presented below. Does this treatment affect enzyme activity? TREATED – 35, 45, 36, 11, 41, 29, 38 NOT TREATED – 10, 18, 8, 29, 17, 8, 11Previous research shows that shade-adapted plants produce more chlorophyll than sun-adapted plants produce. Previous research also shows that sun-adapted plants produce more of the key enzymes that catalyzes photosynthesis and cellular respiration than shade-adapted plants produce. Describe which experiments support each of these previous research findings. Cite your results from Procedure II and Procedure III to support your reasoning.
- Light that the chlorophyll-a pigment uses may be measured by the solar-induced fluorescence (650-850nm). This fluorescence caused by the sun and a plant's gross primary output are correlated linearly. Why can solar induced fluorescence be used to infer net photosynthesis?An experiment was done to determine how color of light and distance affects photosynthetic activity of the pond weed. Pond weed was placed in a test tube containing a solution of sodium hydrogen carbonate, and had its end cut; light was placed 50 cm away and four colors were tested (clear, red, blue, and green). After placing the light, the pondweed was given a certain amount of time to adjust before counting the bubbles, bubbles were counted for 1, 3, and 5 minutes. Only the bubbles that came out of the cut end was counted to represent the rate of photosynthesis. Below is the tabulated results. What are the possible factors or errors that could have affected clear/white light to have lower photosynthetic activity? In theory this should have the highest rate.Light that the chlorophyll-a pigment uses may be measured by the solar-induced fluorescence (650-850nm). This fluorescence caused by the sun and a plant's gross primary output are correlated linearly. Why does this reasoning shows that solar induced fluorescence can be used to infer net photosynthesis?
- To ensure that the plant was kept at a constant temperature at each light intensity in this experiment: Select one or more: a. the temperature of the room was adjusted to keep the tube of Elodea submerged in water at a constant temperature with a thermometer inside the tube b. the tube containing Elodea submerged in water was surrounded by light on all sides with a thermometer inside the tube c. the tube containing Elodea submerged in water was placed in a water bath with a thermometer in the water bathSolar-induced fluorescence can be used to infer net photosynthesis. This is because this solar-induced fluorescence is able to measure the light that is used by the chlorophyll-a pigment (650-850nm). There is a linear relationship between this solar-induced fluorescence and the gross primary production of a plant. How does measuring chlorophyll-a pigment with solar-induced fluorescence help us infer net photosynthesis?You will create a slide show/ Canva/ Website on the flow chart of photosynthesis phases .Your poster should include, but is not limited to:○ The overall equation is at the top.○ A diagram of a chloroplast which indicates where each reactant is used and whereeach product is synthesized. ○ All intermediary steps were studied in the light-dependent reactions and light-independent reactions, in the form of a flow chart(try to add details around them), using appropriate terminology. ● You will also submit a detailed explanation of your flow chart, using appropriateterminology.
- Briefly describe the pigments used in photosynthesis, where these pigments are located in the plant, and what these pigments do. Define both absorption spectrum and action spectrum, and describe the purpose of using a spectrophotometer to determine the absorption spectrum and how that correlates to the action spectrum. Be sure to discuss how the spectrophotometer allows the identification of the pigment solutions.DCPIP (2,6-dichlorophenol-indophenol), a blue dye, can act as an electron acceptor and becomes colorless when reduced. A suspension of chloroplasts is prepared, and DCPIP is added to the suspension. The sample is split into two test tubes. One test tube is exposed to light and the other is wrapped in foil (dark control). What would you observe over time comparing the light exposed and the dark control test tubes? A. The sample exposed to light stays blue. The sample kept in the dark turns colorless. B. The sample exposed to light turns colorless. The sample wrapped in foil stays blue. C. Both samples stay blue. D. Both samples turn colorless.In a photosynthetic investigation, a student measured the following pH of the stroma and the inner thylakoid compartments of spinach leaf cells at the conclusion of the experiment. Source of Fluid pH (mean) Standard Error of Mean (SEM) Stroma 8.2 0.75 Inner compartment of thylakoid 5.6 0.35 Describe the stages of photosynthesis. Explain the need for a constant supply of inorganic carbon dioxide.