The effect of crowding on Duckweed growth rate. Sarah Morscheck*‚ Olivia Drukker‚ Hannah Zeigerson‚ and Jacob Shaffer Methods: To test the effect of population density on Duckweed growth rate‚ we obtained 24 clear‚ clean‚ plastic cups and added 100 ml of artificial pond water. There were 8 cups in each treatment‚ high density had 100 thali‚ medium density had 50 thali‚ and low density had 10 thali. The cups were randomly placed on a tray. The thali were counted and then rearranged every Monday
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This experiment focuses on the effect of light intensity on the rate of photosynthesis. In simple terms this refers to how the production rate of the products of photosynthesis (oxygen and glucose) will be affected by a light source at different distances. The hypothesis states that “If there is a higher light intensity‚ then more oxygen and glucose molecules will be produced‚ and the rate of photosynthesis will increase.” This hypothesis was accepted. This was determined by counting the number of
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Chlorophyll Extraction This easy science project shows simple and efficient method of chlorophyll extraction from a plant. This is only a demonstration of working method which can be refined and used for a full scale science project. Plants contain many pigments in different proportions. For flowering plants it’s mostly a combination of chlorophyll-A‚ chlorophyll-B‚ pheophytin and Carotenes. These pigments have shades of green‚ blue green‚ grayish‚ and yellow-orange. Their concentration is
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Biology Coursework ¡V Does The Light Intensity Affect the Rate of Photosynthesis The Investigation In this experiment I will investigate the affect in which the light intensity will have on a plants photosynthesis process. This will be done by measuring the bubbles of oxygen and having a bulb for the light intensity variable. Variables The input variable which will be used in this investigation will be the light intensity (this will be a 100Watt bulb being moved closer and further away from
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Photosynthesis is the process by which green plants use the light energy to convert carbon dioxide and water into simple sugar called glucose‚ which provides a basic energy source for the plant. Photosynthesis occurs in leaves that contain specialized cell structures called chloroplasts. Chloroplasts contain molecules of a green pigment called chlorophyll‚ consisting largely of carbon and hydrogen. It gives green color and absorbs the necessary light for photosynthesis. Chloroplasts are found in palisade
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An Increase in Light Intensity Increases the Rate of Respiration M. Chauntise‚ S. Shaika‚ R. Shantal INTRODUCTION The sun plays a vital role in sustaining an entire living world whether indirectly or directy using a transformation process called photosynthesis. This process assists in nourishing plants and keeping them alive. For example‚ trees grow very tall in the rainforest where there is an abundance of water in order to reach as much light as they can. For this reason‚ in order to survive the
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measure the relative intensities of light at various horizontal distances from the lamp. The light detector (photocell) will enable us to make light intensity measurements that are more precise than those made with the human eye. The photocell converts light intensity to an electrical potential difference‚ which can be measured with a voltmeter. Using our measurements made from numerous elevations above the table‚ we assumed voltmeters were proportional to the intensity of light and observed a relationship
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Wavelength and Light Intensity on Photosynthetic Activity ABSTRACT The photosynthetic process of eukaryotes revolves around chlorophyll‚ the substance that give plants their green color. Plants convert light energy into chemical energy by means of photosynthesis. This experiment tests the reaction rates of a chloroplast suspension against variables of wavelengths and light intensity. Both a control and an experimental cuvette were exposed to a range of 450 to 750nm of light and varying intensities to test
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ammonia and die. Duckweed does not have a specific depth of water that it is required to grow in‚ however it is not ideal for the duckweed to grow in shallow conditions. If the pond is too shallow than the freezing and evaporating point of the pond will fluctuate too much for the duckweed to grow. Duckweed is composed of a think cell wall‚ with chloroplasts‚ mitochondria‚ smooth ER‚ Rough ER‚ a vacuole‚ cytoplasm‚ goolgi body‚ nucleus‚ nucleolus. All these parts in duckweed help the plant carry
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The Effect of Duckweed on Natural Pollutants: Part I- Introduction Duckweed: What is it? When you type in “duckweed”‚ or Lemnaceae‚ if you choose to use the scientific name‚ on your computer‚ you see countless entries on how to get rid of duckweed from your pond‚ how much duckweed can be a nuisance when it gets stuck in your fish filter‚ etc. However‚ this is a plant that can be underestimated. I chose to work with duckweed in my project because of the countless ways it can help the environment
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