Introduction Biology Coursework - To investigate a factor which may affect the rate of photosynthesis of Canadian pondweed. Species of Elodea are also known to accumulate metals from the sediment and release them into the waterbody. Photosynthesis is a reproductive system that… 473 Words 2 Pages Photosynthesis is a biochemical process in which plant, algae, and some bacteria harness the energy of light to produce food. Rate of photosynthesis: limiting factors Limiting factors The main factors affecting rate of photosynthesis are light intensity, carbon dioxide concentration and temperature. I will leave the apparatus like this for enough time to collect a measurable amount of gas, but so I can fit in as many different experiments as possible - and every 2 minutes I will record the volume of gas collected. I am going to investigate if carbon dioxide affects the rate of photosynthesis. Some experiments on aquatic weed control in fisheries lakes and streams in Upper Pradesh.
The 3 basics of photosynthesis is light, water, and oxygen each if these things were stumbled upon by different people. This is because they are needed to absorb the light energy during the light dependent reaction. Scroll down and click on the link to Photosynthesis. References Alaska Plant Materials Center, 2014. There are more experiments that we could do to get more evidence as I just said maybe a different plant. A number of small improvements to the report would have increased its overall grade significantly.
A way to stop heat affecting the result would be to stand a block of Perspex in between the lamp and the elodea which would stop most of the heat and still allow light to go through. Research question: How does the concentration of sodium bicarbonate relate to the amount of oxygen produced by Elodea Canadian pond weed in the process of photosynthesis? Lista nacional de especies de plantas invasoras y potencialmente invasoras en la República de Cuba - 2011. Plants are the primary producers. On the day of the experiment, cut 10 cm lengths of Elodea, put a paper-clip on one end to weigh them down and place in a boiling tube of water in a boiling tube rack, near a high intensity lamp, such as a halogen lamp or a fluorescent striplight. Sometimes cutting 2—3 mm off the end of the Elodea will induce bubbling from the cut end or change the size of the bubbles being produced.
Aquatic weed control with sodium arsenite. Introduction Photosynthesis occurs in plants, is the process of converting light energy into chemical energy and storing it in the bonds of sugar of the organism. It is available online and from some pet shops and aquarium suppliers. Photosynthesis is the process through which plants make their food by converting light energy into chemical energy. I will also have to measure the temperature of the water which contains the pondweed otherwise it may affect my results because plants will photosynthesise at a quicker rate at different temperatures.
When several references are cited, they may give conflicting information on the status. Blockage of larger channels may inhibit ship movements, thus affecting trade. Light-dependent process, a temperature-independent reaction where light energy is absorbed by the photosynthetic pigments and transformed into chemical energy which is used for water, splitting into oxygen molecule, proton H+ for… 1133 Words 5 Pages research task project I have decided to see if light is necessary for photosynthesis to take place in green plants. Without light photosynthesis can't take place as it is the energy source. The white light, and the water were the controlled variables. It was introduced into , in about 1836, and appeared in in 1841, spreading through both countries in ponds, ditches and streams, which were often choked with its rank growth. Proceedings Annual Conference Southeastern Association Game Fish Commission, 11:125-132.
The rate of photosynthesis can be figured out by; Evaluation I believe that my results were accurate as they were all in order. Bulletin Research Station Groenendaal, Series D, 17:38. Almost all life on Earth depends on photosynthesis, either directly or indirectly. Demonstrated effects include reducing direct sunlight by correctly-orientated marginal shade from vegetation, or even artificial materials near the water surface or also reducing in the light penetration of water Dawson, 1986. When Photosynthesis occurs it takes in the co2 from the atmosphere and releases oxygen… 510 Words 2 Pages Photosynthesis is a process in plants, algae, and some prokaryotes, that coverts solar insulation into chemical energy stored in glucose or other organic compounds. Europe has been particularly affected with the first record dating back as far as 1836.
Another problem of the experiment is the amount of carbon dioxide in the water, to make the experiment a fair test all plants must have equal amounts of carbon dioxide and enough for the whole experiment, a way to do this would be to take equal amounts of potassium hydrogen carbonate and put it with the elodea. As plants respire both night and day this starch is often used up during the night when photosynthesis cannot take place. Otherwise I could have fell and injured myself. Overall, both graphs and my results support my predictions fully. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report.
Measuring photosynthesis via the production of oxygen Oxygen can be measured by counting bubbles evolved from pondweed, or by using the Audus apparatus to measure the amount of gas evolved over a period of time. Canadian pondweed produces oxygen correspondingly to the rate of photosynthesis. Species tested include Tilapia melanopleura, T. I found out that the rate of photosynthesis increases as it moves closer to the light source; this proves that as the plant moves closer to the light source the rate of photosynthesis increases hence more oxygen. Wavelengths of green light, red light, blue light, and light without a filter change the rate… product of photosynthesis, which is the process that converts energy in sunlight to chemical forms of energy that can be used by biological systems2. I had a curve of best fit but really I should have had a curve that levelled off at the end but instead it curves downwards this was probably due to the plant being poisoned because there was to much carbon dioxide present in the solution which made it denature. Indirectly, this means that the rate of which the discs rise will take longer.
In: Proceedings Annual Northcentral Weed Control Conference, 17:30-31. This could give a comparison between several plants. Ethical issues Look out for small aquatic invertebrates attached to the pond weed used, and remove them to a pond or aquarium. Pollution not only directly effect plants and the cycle of photosynthesis, but pollution can also indirectly harm other elements that contribute to the life of a plant and the cycles it performs. We will use Canadian pondweed.