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At that point the two factors that are kept constant will act as limiting factors and they will be limiting the further increase in rate of photosynthesis.
Method: In this experiment we kept temperature as an independent variable. We cut a piece of elodea and kept it in a beaker of water and anchored it with a paper clip. We placed the lamp 7cm away from the beaker and the lamp was kept at this point throughout the experiment. In order to keep the concentration of CO2 constant we assumed that the CO2 in the water in the beaker remained same throughout the experiment. We changed the temperature of the experiment by changing the temperature of the water in the beaker. We obtained hot water in the beaker by pouring hot water from the kettle in the beaker and we obtained cold water by adding ice to the beaker. We measured the rate of photosynthesis by measuring the rate of oxygen given off by the elodea. In order to measure the volume of air given off we used a photosynthometer. In order to prevent bubbles to appear in the tubing of photsynthometer we kept the tubing in the water.
We started out experiment with initial temperature of 40 Â°C. We used a thermometer to ensure that the temperature of water in the beaker was 40 Â°C and then placed elodea that has previously kept in dark into the beaker. We used a piece of elodea that was previously kept in the dark because this ensured that the plant had not been previously photosynthesing and it avoided us having unfair results. Once we placed elodea in the beaker we immediately started noting the time it took for 5mm3 of air to be trapped in photosynthometer.
The average time taken at 40 Â°C was calculated and it was noted as 6.5 minutes. The experiment was repeated at different temperatures like 15 Â°C, 20Â°C, 30 Â°C. To ensure constant temperature was maintained during each experiment a thermometer was placed in the
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Photosynthesis is the process through which green plants, algae, and cyanobacteria convert the sun’s energy into chemical bond energy of organic molecules that it consumes as food. This paper covers two experiments on photosynthesis; the first one investigates whether a positive rate of net photosynthesis depends on light levels.
Our results indicate that apparent photosynthetic rate increases with temperature. We discuss the possible reasons for the observed pattern and discuss the implications that the relation may have for plant growth and productivity.
Among several environmental variables, temperature has been known to strongly influence photosynthetic rate of plants (Blackman, 1905).
With the assumption that the rate of photosynthesis as manifested by CO2 consumption would be inversely related to the received light wavelength, drops in CO2 recorded and data calculated. Green wavelength having the lowest rate of photosynthesis was the only data adhering to what we had predicted.
oxygen and carbon (IV) oxide (Berg 71). In this experiment, Light as a necessity of photosynthesis is the variable under investigation. According to the research design in this experiment, leaf disks float
The control variable used was white light on the plant while green and blue light were the dependent variables. White light contains seven colors inclusive of blue and green, hence their dependency.
White light was expected to
Photosynthesis relates to the process through which green plants and other specific organisms use sunlight in synthesizing carbohydrates from water and carbon dioxide. The process occurs in three imperative stages including harnessing sunlight energy, synthesizing NADPH and ATP using energy harnessed, with the last step being Calvin cycle involving CO2 fixation
The pigments of leave tend to absorb wavelengths of light from 400-700nm which is known as optimum wavelength of visible light spectrum for photosynthesis. On the other hand, respiration is the process by
2 Pages(500 words)Lab Report
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