Bio1. Explain the significance of the principle of competitive exclusion. ............................................................................................................................................... ............................................................................................................................................... .......................................................................................................................................
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What is passive transport? Passive transport is the movement of substances across the cell membrane without the use of energy by the cell. During passive transport‚ substances move down their concentration gradient‚ hence no energy is required. Passive transports can happen through three different channels‚ namely 1. lipid bilayer 2. pore protein 3. carrier protein SIMPLE DIFFUSION What is diffusion? Diffusion is the movement of particles from a high density region to a low
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Chapter 20: DNA Technology Biotechnology: Use of living organisms to perform tasks. * Wine & cheese * Selective breeding * Antibiotic production * Recombinant DNA Restriction Enzymes * Bacterial enzymes: cut up foreign DNA * Specific: only but at recognition sequences * Palindromic: cut at the same base sequence on each strand‚ but in the opposite direction * The exposed bases provide “sticky ends” * H-bond to compliment bases of segments cut with same restriction
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Biology - Chapter 9 Study Guide (DNA) 1. Define vaccine. Substance that is prepared from killed or weakened diseased causing agents 2. What is the name of the scientist that performed transformation experiments? Griffith Name the living organisms used in these experiments. mice 3. What is transformation? A change in the genotype caused when bacterial cells take up foreign genetic material 4. Who discovered what material was responsible for transformation? What is the material?Oswald
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Ernie Reed BIO-013/ Stem Cell Research Sullivan 11.10.2010 STEM CELL RESEARCH What is a stem cell? One can define a stem cell as a cell type that is found in many tissues. This particular cell is unique in the fact that it can divide itself over and over virtually to an infinite number. This process of reproduction ensures that the cells can restore other cells that may have gotten damaged; this process may only occur if the person is still living. The same goes for animals. As the stem cell
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Cell Structure and Function: Tonicity and pH Justin HeshizerBIOL 1107K (80561) 50 Experiment Number 5 10/02/14 Margaret E. Vorndam‚ M.S. Version 42-0038-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a
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CHAPTER 14 LECTURE NOTES: RECOMBINANT DNA TECHNOLOGY I. General Info A. Landmarks in modern genetics 1. Rediscovery of Mendel’s work 2. Chromosomal theory of inheritance 3. DNA as the genetic material 4. Recombinant DNA technology development and applications B. Recombinant DNA refers to the creation of new combinations of DNA segments that are not found together in nature. The isolation and manipulation of genes allows for more precise genetic analysis as well as practical applications
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outline evolutionary mechanisms. Drawing on the psychological literature from more than one topic area of research‚ evaluate how well evolutionary theory provides a satisfactory explanation for human behaviour. The aim of this essay is to assess whether Evolutionary theory presents an adequate explanation for human behaviour. I will be drawing from different psychological literature‚ especially focusing on the research areas of sexual selection and parental care and investment. Evolutionary theory
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Short Essay #1 The ancestor of all life lived approximately 3.5 billion years ago. Needless to say‚ since then‚ many species that once existed in the past are no longer around today. A species can become extinct for a variety of reasons such as climate change‚ natural catastrophe‚ or depravation of resources. The species that is better adapted for these changes will survive and those who are not will at some point no longer exist. This process is referred to as natural selection. Due to natural selection
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Chapter 13: The Theory of Evolution II. Charles Darwin A. In 1831‚ as a naturalist‚ went on a voyage on the Beagle in the southern hemisphere‚ including the east coast of Africa. B. Before Darwin‚ most people believed in divine creation. C. As a naturalist‚ he saw evidence that species may have evolved from a common ancestor‚ like the finches. D. Darwin also saw evidence that the earth is very old. E. He said that natural selection is the mechanism of how organisms adapted to their environment
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