1.1.1 In small unicellular organisms‚ substances move around slowly by diffusion. Diffusion is too slow to move substances round the larger bodies of multicellular organisms. They have a circulatory system: substances are carried in blood pumped by a heart. In a closed circulatory system (eg in vertebrates) blood is enclosed in narrow blood vessels. This increases efficiency: blood travels faster as a higher pressure is generated. Valves ensure blood flows in one direction:
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Reactions of the DNA translocase FtsK and XerC & XerD recombinases from Pseudomonas aeruginosa Luhai Xu Student number 3107041 Supervisor Ian Grainge Table of Contents Abstract 3 LIST OF ABBREVIATIONS 4 Chapter1: Introduction 5 Chapter 2 Materials and Methods 26 Chapter 3: Results 41 Chapter 4: Discussion 63 References 74 Appendix 80 Abstract DNA replication is an important biological process and occurs in all living organisms
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CHAPTER 1 Interest in the human body and how it functions probably developed when our ancestors began to think about the reasons why people became ill and died. All earlier cultures had someone designated as a healer who was responsible for finding plants and herbs that cured body disorders. This healer also was responsible for praying or invoking the assistance of past ancestors to help in the healing process. As cultures developed and science began to evolve‚ interest in and knowledge about
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Human Physiology Packet #1 Slate Masunaga Period 6 Table Of Contents: Chapter 1 Vocabulary Chapter 2 Vocabulary Chapter 3 Vocabulary Did you get it Questions Chapters 1-3 (in order) Review Questions Chapters 1-3 Chapter 1 Vocabulary Anatomy: structure Physiology: function Transverse/horizontal: plane that divides body into superior/upper & an inferior/lower sections Sagittal lengthwise plane dividing the body into right & left sections Midsagittal/median: lengthwise
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in the nucleus that contains DNA Sister chromatid: one of two chromosomes that are genetically identical and held together at the centromere Centromere: the region where two sister chromatids are held together in a chromosome Spindle fibre: a microtubule structure that facilitates the movement of chromosomes within a cell Centrosome: a structure that helps to form the spindle fibres Genome: the complete DNA sequence of an organism Sex chromosome: an X or Y chromosome‚ which determines the genetic
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Bacterial Smears Are Fixed before Staining to? Answer It is important to heat fix the bacterial smear before staining so as to‚ kill the bacteria‚ firmly adhere the smear on to the microscopic slide to prevent washing off during staining‚ and to allow the sample to readily take up the stain. Reference: www2.hendrix.edu What is the purpose of heat- fixing the smear? It helps the cells adhere to the slide so that they can be stained. The purpose of heat fixing is to kill the organisms without
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Abstract Mercury exposure has become a serious‚ mainstream topic that has attracted mass amounts of global attention. Exposure to toxic levels of mercury is devastating to the developing central nervous system and general physiological systems in humans. Studies have suggested that mercury exposure can affect limb coordination‚ academic performance and mercury may have a role in other developmental disorders. There are many ways humans may be exposed to mercury in their daily lives. Populations
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SBI 3U1 – 07: Biology Examination Definitions Unit 1: Diversity of Living Things ➢ Species: a group of organisms that can interbreed in nature and produce fertile offspring. ➢ Morphology: the branch of biology that deals with the structure or form of organisms. ➢ Phylogeny: the evolutionary history of a species. ➢ Taxonomy: the branch of biology that identifies‚ names‚ and classifies species based on natural features. ➢ Binomial nomenclature: the system of giving a two-word Latin name to
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ASSIGNMENT “Islamiat” Topic: Articles On Research About Souls Submitted to: Ma’am Saleha Fatima Submitted by: Syed Muhammad Akbar DDP-FA14-BCS-055 Section-D 1) Greek philosophers Plato and Plotoinus believed that soul pre-exists the body and at death it separates from the body to attain its full and perfect state. Many including Plato‚ Descartes‚ and George Berkeley hold
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ortMedical Magnet Biology Summer Assignment Using half of a 3 x 5 index card‚ place the vocabulary word on the front (no lines) and the definition on the back (lines). Write legibly. Next‚ draw a picture on the FRONT of the card that helps you remember the DEFINITION. For example‚ for
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