Natalia Wierzchon A.P. Biology Lab: 1. Osmosis 09/10/2010 I. Introduction a. Purpose: The purpose of this lab was to observe the diffusion process of water‚ osmosis‚ as well as create an understanding of water potential‚ the basis of osmosis. The experiment proved how water molecules in a solution are able to move from an area of low solute concentration‚ high water concentration‚ to an area of high solute concentration‚ low water concentration‚ diffusing “down” the water gradient.
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Introduction to Biology‚ Lesson 3 Essay Questions: Compare and contrast directional selection and disruptive selection‚ and provide an example of each. Both of these show the distribution of phenotypes. In directional selection‚ the distribution of phenotypes forms a "bell curve." Selection against one of the extreme phenotypes causes the distribution to move in one direction or the other. An example might be plants whose flower color is determined by incomplete dominance: white‚ pink‚ or red
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The Rise of the Superbugs A Superbug is a bacterium that can live in the human body and has the ability to withstand all forms of antibiotic medication. Superbugs are becoming increasingly significant in modern medicine as they are becoming more and more resistant to antibiotics. Antibiotics were discovered in 1928 by Alexander Fleming (Walsh and McManus‚ 2000). This resulted in a huge movement forward in medical history and even greatened human life expectancy. Since then antibiotics have been
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The purpose of this lab was to hypothesize about membrane traffic in lab‚ explain the differences between the solutions hypertonic‚ hypotonic‚ and isotonic and how they respond using the understanding of the cell membrane structure‚ types of transport mechanisms such as active‚ passive‚ diffusion‚ osmosis‚ and explain the movement of particles moving across the cell membrane. In this lab was divided into two parts. The first part was varying the concentration and the second part was varying the temperature
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Biology reflection. My whole life I have been surrounded by different experiences with biology. My family has always been really active and I have always loved being outdoors. We go on camping trips‚ skiing‚ biking‚ fishing‚ swimming‚ and the list goes on. I remember though‚ the first time I went to the beach when we first moved to Poulsbo about 4 years ago. My dad had planned the whole trip so that by the time we got down to the beach‚ we had to hike to it‚ we would be there in time to explore
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002141-0012 Nuba Jackson IB Biology Microbiology IA How effective is Lysol in the reduction of bacterial growth compared to Pinesol in reduction of E. Coli growth in agar at room temperature? Background Information: Pinesol and Lysol are both common household disinfectants that make very big commercial claims; both claim to kill 99.9 percent of bacteria. Lysol contains
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The article “Biology is Beauty” by Geoffrey Cowley touches on the aspects behind beauty. The article states that everyone shares a sense of what is attractive. Basically‚ Cowley is stating that people are attracted to what is on the outside‚ even if we do not know it. Even though points of attraction can vary over societies‚ beauty is an innate quality we all think of. The article touches on a few examples that the author feels explains. First‚ Cowley says that humans love symmetry; people prefer
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What are the central ideas of Cells? • What are cells? – Cells are the smallest basic unit of living things. • What do they do? – Cells take in raw materials and making new substances. • Why do they do this? – In cells‚ organelles carry out activities to keep the organism alive. – E.g. synthesising proteins and fats‚ releasing energy from glucose. What are the central ideas of Movement of Substances? • What processes describe how substances move from one region to another? –
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in one eukaryotic cell is copied and distributed to two identical daughter cells. B) A gene in a eukaryotic cell is transcribed and translated to produce a protein. C) The genetic material from one bacterial cell enters another via transformation‚ transduction or conjugation. 16 total pts possible A) max 8 pts combined (4 pts max each part – Part a is looking for “copy and distribute”) “copy”= DNA replication -when DNA is copied- interphase‚ S phase of cell cycle -recognition
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Rattlesnake Bullfrog Tuna Screwfly fly Silkworm moth Tomato horn worm Wheat Rice Baker’s Yeast Candida Yeast Neurospora 0 3 3 3 3 3 3 3 3 5 6 6 2 3 4 5 9 13 13 18 18 17 19 19 01.05: Earth’s Early Atmosphere Biology What does it mean when scientists say that living organisms share a universal genetic code? -When scientists say that living organisms share a universal genetic
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