Discovering Cells Directions: answer the following questions using complete sentences. Use pages 6C-13C of your textbook. 1. What are cells? 2. When was the first microscope invented? 3. What is a microscope? 4. What is the difference between a simple and compound microscope? 5. Who was one of the first people to observe cells? 6. What did Anton van Leeuwenhoek discover? 7. A Scanning Tunneling Microscope (STM)
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drastic changes going on in Russia affected not only the civilians but many countries around the world. In the novel Animal Farm‚ the animals rebel against their master Jones just like what happened in Russia. The animals were tired of being told what to do and not being cared for in return they wanted to run themselves and not take orders from a man. George Orwell’s novel Animal Farm contains‚ allegories such as Czar Nicholas II’s removal from power‚ Joseph Stalin’s show trials‚ and the Russian
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Salt from green beans Name: Ashni Couprie and Dennise Susanto Class: 5c Introduction From previous experiments we ’ve learned that salt is extracted from green beans. To be more specific: salt is extracted from when the beans are cooked in water in which salt has been dissolved. This experiment is based upon the osmoses theory. According to this theory the cell walls of the green beans are what we call a semi permeable membrane. This membrane only lets water through and not the substance
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reactions must take place for the substances of photosynthesis to be transported around the plant. energy is supplied to plant cells through respiration movement of substances occurs by diffusion‚ osmosis and active transport. Water and mineral ions must be supplied and conserved in the plant. cell wall makes plants have no mobility cell wall bring turgor pressure. Turgor pressure increased in ‘woody plants’ - with lignin. photosynthesis - is the process whereby radiant energy from the sun is
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Cell wall is a fairly rigid‚ protective and supportive layer surrounding the cell external to plasma membrane of plants‚ bacteria‚ archaea‚ fungi and algae. It is absent in animals and most protists. It was first observed by Robert Hooke in 1665. It is not an entirely rigid structure as the cell wall expands due to the growth of the cell. It varies in thickness from o.1mm to I0mm.in most of the cells‚ cell wall is present from the very beginning to the last‚ but in slime molds (myxomycetes)
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SPECIALIZED CELL ANIMAL Sperm cells PLANT Xylem cells are specialised to find a female cell (egg cells) and join with it. They have tails‚ that makes them move in water to find and fertilize the female cell. They can move because they have many mitochondria located between the tail and the head‚ which gives them energy. In the head‚ there is a vacuole filled with acrosome‚ which is a specialized Lysosome that releases enzymes in order for the Sperm Cell to break into the Egg Cell‚ through the
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PLANT SAFETY Industrial accidents present a serious problem like production losses and property damage that can possibly have a crippling effect on the operations of the organization. However‚ it is possible to and practicable to control industrial accidents Objectives of The Indian Factories Act 1948 • To protect human beings from being subjected to unduly long hours of bodily strains of manual labor‚ and • Employees should work in health and sanitary conditions so far as the manufacturing
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Medicinal Plants And Their Medicinal Values ALOE VERA FLOWER • Aloe Vera is used in traditional medicine as a multipurpose skin treatment. In Ayurvedic medicine it is called kathalai‚ as are extracts from agave.[59]:196 for aloe:117 for agave Early records of Aloe Vera use appears in the Ebers Payrus from the 16th century BC‚[17]:18 and in Dioscorides’ De Materia Medica and Pliny the Elder’s Natural in the mid - first century AD.[17]:20 It is also written of in the Juliana Anicia Codex of 512 AD
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keep costs to a minimum or to hire several machines at once makes renting used equipment most sensible and economical option. Caterpillar has a variety of vehicles such as excavators‚ graders‚ tractors‚ dozers and etc. In this work I will differentiate between the wheel excavator M318D and the track excavator 329D. The M318 D is a CAT wheel excavator having an engine of C6. The maximum travel speed is 37Km/h. It comes with several work tools which are designed to provide best performance such as
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CELL DIVISION REVIEW 1. Name the phase of interphase in which cells copy their DNA. G-2 2. Anaphase 3. Name the phase in which spindle fibers disappear. telephase 4. Put the following cells in the correct order. A interphase B telephase C anaphase D prophase E metaphase 5. centromere 6. DNA that is spread out in the nucleus of a non-dividing cell is called chromatin. 7. Name the phase this cell is in. 8. Name
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