between the structure and function of four specialised human cells. The human body is made up of trillions of different cells; all play a huge role in the running and function of the body. They are the foundation of all living things. Each different cell has its own exclusive job. Without cells the human body would simply fail. All cells contain organelles which are the structures of the cells itself‚ organelles have individual functions. This essay will investigate the structure and function of four
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Prokaryotes;; (accept Latin equivalents) any two for one mark‚ all three for both that (they are) fertile; 1 (b) 2 1 (c) Total 4 __________________________________________________________________________________ klm Question 3 (a) GCE: Biology B – BYB4 June 2002 Mark across whole of two parts in (a) to credit the following possible points (structure) Distant object Close object Cornea suspensory ligament Ciliary Body - in tension - relaxed; - converges light/refracts/bends
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The cell membrane is made up of fats‚ proteins‚ lipids‚ and carbohydrates‚ and is a permeable structure. However‚ this permeation is very discerning because it only lets certain things pass through it. The cell membrane has a layer of phospholipids with hydrophobic ends and hydrophilic tops. The “tails” are made out of phosphate‚ while the “heads” are made up of two strings of fatty acids. There are two layers of these phospholipids‚ called the “bilayer”‚ and the tips of each phospholipid are facing
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Prokaryotic cells are single celled organisms that were formed at the formation of the earth‚ so are the most basic life forms. The prokaryotes are organised in the ‘three domain system’ and include bacteria and blue-green algae. Prokaryotes live in many environments including extreme habitats such as hydrothermal vents‚ hot springs‚ swamps‚ wetlands‚ and the guts of animals. This is a diagram of a prokaryote cell and it shows that they are not very complex cells. They do not contain any membrane
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The Function of Packaging Physical Protection One of the main purposes for packaging is to keep items safe. Many of the materials used to make packaging can help to keep moisture or air away from items that might decay. Some packaging is also made very durable so it can protect fragile items from damage. Organization Packaging helps us separate things into categories and keep them organized. If you fill a box with one type of item‚ it helps you keep that item separate from other items‚ and
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As with all matters of the heart‚ you’ll know when you find it. – Steve Jobs As Steve Jobs states in the opening quote‚ “Your work is going to fill a large part of your life”‚ ”and the only way to do great work is to love what you do”. Growing up we all had dreams of what organization we would work for. We dreamt of either owning our own organization or working for someone else’s. We all had different dreams because we all have a different genetic makeup that determined our personality and our
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SCIENCE CELL – STRUCTURE AND FUNCTIONS Cell – Structure and Functions Cell as the Basic Unit of Life The cell is the basic structural and functional unit of all living organisms. It is the smallest part of the body of an organism‚ is capable of independent existence and is able to perform the essential functions of life. Discovery of the Cell Robert Hooke observed cork cells under a simple microscope designed by him. He observed compartments resembling honeycombs and each compartment
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Sophisticated societies are dependent on mass media to deliver health information. Marshall McLuhan calls media "extensions of man." G. L. Kreps and B. C. Thornton believe media extend "people’s ability to communicate‚ to speak to others far away‚ to hear messages‚ and to see images that would be unavailable without media" (1992‚ p. 144). It follows that employment of mass media to disseminate health news (or other matters) has‚ in effect‚ reduced the world’s size. The value of health news is related
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ESSAY ‘The structure and importance of the plasma membrane found within and around all cells’ The plasma membrane surrounds all eukaryotic and prokaryotic cells. Eukaryotic cells have membrane bounded organelles whereas prokaryotic cells do not. The plasma membrane forms the boundary between the cell cytoplasm and the environment. Its function are to allow different environments to be established inside and outside the cell. It also controls the movement of substances into and out of the cell. The cell
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Comparison and contrast the 4 types of market structure: Perfect Competition Definition * there are many buyers and sellers‚ the products are homogeneous and sellers can easily enter and exit from the market Characteristics * Large number of buyers and sellers – firms are price takers. * Homogenous or standardized product – the buyers do not differentiate the products of one seller to another seller. * Free of entry and exit into the market. * Role of non-price competition
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