Page 1 of 17 - About 162 Essays
  • How Does Chlorophyll Affect Plant Growth

    Found in the chloroplasts of plants, chlorophyll absorbs certain wavelengths of light within the visible light spectrum (webexhibits, 2016). Chlorophyll is able to absorb light colours such as red and blue however green is reflected making the plant appear green. Apart from colouring, the fundamental role of chlorophyll is to channel the energy of sunlight into chemical energy. There are multiple types of chlorophyll however all land plants contain chlorophyll a and b. The main differences between the two are that Chlorophyll A is the principle photosynthetic pigment, present in all photosynthesising autotrophs with the exception of bacteria and it becomes blue green in its pure state. Whereas, Chlorophyll B is an accessory photosynthetic pigment, becomes olive brown in pure state and is not evident in diatoms, cyanobacteria and red and blue bacteria. Chlorophyll is also called photoreceptors which by definition are a structure in a living organism, especially a sensory cell or sense organ that responds to light falling on it. In this instance, the photoreceptor traps light and exploits it through the process of…

    Words: 1038 - Pages: 5
  • Spatial Variability In Plankton Communities

    The difference between the two filter chlorophyll a concentrations is the presence of the smaller phytoplankton in the community. This allowed us to determine the dominant size of phytoplankton at each station. Chlorophyll a concentration was analyzed by extracting chlorophyll a from the respective filter and measuring fluorescence present in the sample. The filters were placed in centrifuge tubes with 90% acetone and placed into a freezer overnight. The next day, 1 mL of the sample was…

    Words: 1736 - Pages: 7
  • Respiration And Photosynthesis

    been completed, proceed by obtaining five 50 mL beakers. Then place 40 mL of sodium bicarbonate and 10 spinach leaf disks into each 50 mL beaker. Next, immediately place one of the 50 mL beakers into each of the light boxes, making sure to also place one of the beakers into the light-proof cabinet as well. Also, make sure the light boxes form a square around the incoming light source. Next, proceed by turning on the light and at five minute intervals, all the way up to thirty minutes, make sure…

    Words: 2271 - Pages: 10
  • Spinacia Oleracea Synthesis Lab Report

    photosynthesis comes from the sunlight absorbed by the chlorophyll molecules (Merzlyak, Chivkunova, Zhigalova, & Naqvi 2009). These chlorophyll molecules then transfer the light energy to chloroplasts and that light energy is converted into chemical energy (Merzlyak, Chivkunova, Zhigalova, & Naqvi 2009). The purpose of this experiment was to observe what the absorbance spectrum of Spinacia oleracea extract was and what the absorbance spectrum of the pigments were within the extract. From the…

    Words: 736 - Pages: 3
  • Photosynthesis Experiment: Light Color And Photosynthesis Inquiry

    Light Color and Photosynthesis Inquiry Introduction: Photoautotrophs are organisms that make their own food using sunlight such as plants. They acquire free energy through a process called photosynthesis. Through photosynthesis, sunlight provides the required energy to build carbohydrates from CO2 and H2O. This entire process takes place in the chloroplast which contains chlorophyll. Chlorophyll is the location that absorbs the sunlight and combines carbon dioxide and water in order to make…

    Words: 736 - Pages: 3
  • Efficacy Of P. Putida And P. Fluorescens Isolates

    of a plant, the plants were used for all in situ measurements as growth parameters. The plants were sampled on 0, 3rd and 6th day after stress application. 1.4. Assessment of Growth Effects by PGPR Maize leaf samples were randomly collected 0, 3rd and 6th days after drought stress (DAS) with five biological replicates for each treatment group. Plant height (cm) was measured from the base of the plants to the tip of longest leaf. Root and shoot fresh weight (g) and lengths (cm) were measured from…

    Words: 1009 - Pages: 5
  • Rate Of Photosynthesis Lab Report

    Therefore, photosynthesis works best in a more neutral environment where the pH levels aren’t too acidic or too basic. Introduction - Photosynthesis is a process that uses the energy from sunlight and converts carbon dioxide into organic compounds. There are several ways to test the rate of photosynthesis and to determine what factors and elements are important for this process to be successful. Chromatography is known as the separation of a mixture by passing it in solution or suspension or…

    Words: 1269 - Pages: 6
  • Essay On Photosynthesis

    Explain. The colors and wavelengths that have the highest potential to drive photosynthesis are blue (490nm) and red (680nm). This is because chlorophyll a absorbs mostly blue light, Some red light is also absorbed. 2) Which wavelengths would you suggest have the poorest potential to drive the photosynthetic light reactions? Explain. Green (500-570nm) has the poorest potential to drive photosynthesis because it is the least absorbed by chlorophyll during photosynthesis. If it has a low…

    Words: 881 - Pages: 4
  • Compare And Contrast Plant Pigment By Shirley Raps And Jeffrey Harborne

    Among this group of pigments are chlorophylls, phycobilins, carotenoids, and reaction center pigments which causes plants’ green, blue, yellow and orange colors, respectively. Nonphotosynthetic pigments are used to attract insects for pollination and animals for seed dispersal. This group is comprised of about one hundred different types of anthocyanins which can make a plant scarlet, crimson, purple, mauve, and blue depending on the type present (Raps and Harborne). Raps and Harborne further…

    Words: 865 - Pages: 4
  • Light And Photosynthesis Essay

    Lab Question: Does the intensity of light affect the plant’s photosynthesis? Background information: There are three main elements which has a huge impact on the plant’s photosynthesis: light, temperature, and carbon dioxide.(Plant and Light) However, this lab is focused on how the intensity of light affect the plant’s photosynthesis in order to see how the intensity of light affect the plant’s photosynthesis, specifically Elodea plants. Photosynthesis is a process which happens in all plants…

    Words: 788 - Pages: 4
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