which yield glucose and oxygen as a byproduct. The process of photosynthesis is divided into two parts. The first part is known as the light-dependent reactions which undergo in the thylakoid membrane of the chloroplast‚ and the second part is the calvin cycle which occurs in the chloroplast stroma. In order for a plant to undergo photosynthesis‚ it requires sunlight as its common source of energy. During the light dependent reactions‚ pigment and chlorophyll molecules in photosystems 1 and 2 absorb
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enclosed in a membrane that defines their boundaries. In the Hydrilla leaf‚ observed under the microscope‚ Cells were so distinct that the outline and the rectangular shape of the cells were clearly seen. Individual cell Middle lamella Chloroplasts
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tiny cells‚ so small that we are unable to see them with our naked eye. Animals and plants have many features in common within a cell such as a cell membrane‚ cytoplasm‚ mitochondria‚ ribosomes and the nucleus. Plant cells also have a cell wall‚ chloroplasts and a vacuole. We use microscopes to observe cells. I am going to carry out my practical examination using a light microscope to produce a magnified image of each cell. There are many features of a light microscope such as: * They use light
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thus chemical energy is the product. This is different from respiration because respiration transforms chemical energy into energy usable by cells; in this case chemical energy is the source. Photosynthesis occurs in the chloroplasts‚ using the chlorophyll inside of the chloroplasts‚ while respiration occurs in the mitochondria. Photosynthesis produces oxygen as a by-product‚ while aerobic respiration requires oxygen to even work. Photosynthesis produces NADPH2 in its workings‚ while aerobic respiration
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According to Charles Darwin‚ the emergence of a new species is a consequence of natural selection acting on existing species. Building upon this idea‚ the diversity of life must have originated from a few species. Although the details of prehistoric life may never be answered with certainty‚ evidence from geologic fossils allows us to hypothesize how life began on Earth. In fact‚ there are many theories as to how life developed‚ but the most accepted idea is the abiotic evolution of organic molecules
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photosynthesis. The purpose of this laboratory experiment was to determine which solution would have the highest impact on oxygen production within the aquatic plant‚ Elodea densa (Brazilian Waterweed). The photosynthesis reaction which occurs in the chloroplasts in the leaves of the plant
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tutorvista.com‚ Prokaryotes differ from eukaryotes in their structure‚ packing‚ density‚ and arrangement of their genes on the chromosome. Differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts‚ the cell wall‚ and the structure of chromosomal DNA. All cells share some common characteristics that make them living things and all organisms are composed of cells which are the basic fundamental unit of life. Also all living organisms are
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Experiment 5 Title: Membrane Permeability Objectives: 1. Define solvent‚ solute‚ solution‚ selectively permeable‚ diffusion‚ osmosis‚ concentration gradient‚ equilibrium‚ turgid‚ plasmolyzed‚ plasmolysis‚ turgor pressure‚ tonicity‚ hypertonic‚ isotonic‚ hypotonic; 2. Describe the effects of hypertonic‚ isotonic‚ and hypotonic solutions on Elodea leaf cells and onion scale leafs. Introduction: Membrane permeability is a quality of a cell’s plasma membrane that allows substances to pass in
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membrane‚ inner membrane‚ cristae and a matrix. Each of these serve a special job and without these‚ mitochondrion couldn’t make the energy that the cell needs. Mitochondrion and chloroplast are the only organelles that are surrounded by two membranes. These two organelles complete each other in other ways too – chloroplasts use carbon dioxide and food to produce oxygen and sugar by photosynthesis and mitochondria use oxygen and sugar to produce carbon dioxide‚ water and energy by cellular respiration
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surface area of the leaf larger. The reason I think a higher light intensity could make the surface area larger is the fact that there would be a larger amount of chlorophyll‚ containing chloroplasts‚ for photosynthesis. By having leaves of a larger surface area‚ there would be a much more efficient use of the chloroplasts (containing chlorophyll) and the high intensity light available. Apparatus In order to carry out this experiment we will need: ·A light probe ·A graphing calculator ·A ruler Method
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