pigments are responsible for absorbing and trapping light energy the major pigments of photosynthesis are the chlorophylls. The two chlorophylls found in green plants are chlorophyll a and chlorophyll b. other pigments include carotenoids and phycobilins‚ sometimes referred to as accessory pigments. Carotenoids occur in all photosynthetic organisms‚ while phycobilins occur in the red algae and cyanobacteria. HYPOTHESIS VARIABLES Variables | Methods to handle | Manipulated variable : | | Responding
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pioneer species are photosynthetic‚ there are a few limiting factors that affect the rate of photosynthesis: 1. Light Intensity: As light intensity increases‚ the rate of light-dependent reactions that take place during photosynthesis‚ and therefore photosynthesis‚ generally increases proportionately. However‚ as the light intensity is increased‚ another factor will eventually limit the rate of photosynthesis 2. Carbon Dioxide Concentration: An increase in the carbon dioxide concentration increases
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Plant Cells and Solar Cells Photosynthesis is the process of producing and releasing oxygen in the air. It needs sunlight‚ carbon dioxide and water. During the process of photosynthesis‚ the plants decompose the molecules of hydrogen and carbon-dioxide into hydrogen; carbon and oxygen produce glucose which forms the source of their energy‚ growth and food. Few years ago we knew that the only source of energy is photosynthesis which is used by plants to harness solar energy. Nowadays
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creating high hydrogen ion concentration. Photosynthesis: • What is the overall goal of photosynthesis? The overall goal of photosynthesis is to chemically change light into energy. • Because photosynthesis only occurs in plants‚ why is it essential to animal life? It is essential to animal life not only for nutrients from the plants but also because of the byproduct oxygen that is put out from the plants from the photosynthesis process. • What is the role
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(CO2) and water (H2O); the process of photosynthesis is a complex series of chemical reactions resulting in the production of glucose and oxygen (O2). Glucose is a simple sugar‚ which is further processed into fructose and sucrose‚ and any sugars not required immediately to be metabolized for their energy are converted into starches: complex carbohydrates used to store these essential sources of energy for when they are required. The process of photosynthesis is summarized in a series of reactions
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2013.2014 S.T.F.A Lee Shau Kee College Biology SBA Name: Chan Ka Wing 6D(1) Title: Investigation of the effect of light intensity on the rate of photosynthesis Objective: To investigate the effect of light intensity on the rate of photosynthesis Principle: why this method? Variables: Apparatus and materials: 1 pipette 1 pipette filter 1 boiling tube 1 beaker 1 thermometer 1 stand and clamp 1 clip 1 60-watt bench lamp 1 razor blade 1 meter ruler 1 rubber tubing 0.25% sodium hydrogencarbonate solution
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smaller ones with energy being released‚ and anabolic reactions e.g. photosynthesis are where smaller molecules are built up into larger ones which require energy. Catabolism provides the energy for organisms to synthesise larger molecules in its anabolic reactions. To release energy‚ ATP is hydrolysed into ADP and Pi (an inorganic phosphate) which releases energy that can be used for energy requiring reactions such as photosynthesis. However to maintain the organisms anabolic reactions‚ ATP must be
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selective breeding. Anyways‚ most plants require light in order to grow and conduct photosynthesis. Plants that have been previously grown in the dark are incapable of photosynthesis since they lack chlorophyll and many polypeptides needed for light harvesting. But once they have been exposed to light‚ over time‚ reorganization of the plastid membranes occur and all the required enzymes and proteins needed for photosynthesis appear. So undetectable levels of these proteins suddenly appear and become
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Definition/comparison questions Evolution / Selection Evolution is a slow continuous process of change that happens in plants and animals over a long period of time resulting in a change from simpler to more complex forms. This is the reason modern day plants and animals are different from those of past. The competition for resources will favour organisms with better adaptability and certain variations over others hence leading to change in the rate of occurrence of certain traits within that population
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respiration and oxygenic photosynthesis are two cellular processes that have evolved in similar ways. Cellular respiration is responsible for the process of ATP‚ meanwhile oxygenic photosynthesis is the process of turning light energy into food. It is evident that both of these processes have their own reactants‚ products‚ and biochemical pathways. Both of these processes have evolved from their primitive original state‚ but it is important to understand that oxygenic photosynthesis evolved before aerobic
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