SPM Biology Form 4 Notes – Nutrition (Part I) Photoautotrophs Type of Nutrition * Nutrition – process by which organisms obtain energy and nutrients from food‚ for growth‚ maintenance and repair of damaged tissues. * Nutrients – the important substances which are required for nourishment of an organisms. * Living organisms are divided into two groups (based on the nutritional habits): autotrophs and heterotrophs. (i) Autotroph * Autotrophs – organisms that are able to synthesise
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Biology Study Guide Which one of the following statements is false? Selected Answer: a. Factors that alter DNA and make cells cancerous are called carcinogens. Which one of the following is false? Selected Answer: b. DNA packing tends to promote gene expression. Silencers are sites in DNA that Selected Answer: c. bind repressor proteins to inhibit the start of transcription. Proteins that bind to DNA and turn on operons by making it easier
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II. BIOLOGY AND BEHAVIOR Objective II.1 Identify the basic components of the neuron. Key Terms neuron dendrites axon cell body (soma) Exercises 1. What is a neuron? Neurons are individual cells in the nervous system that receive‚ integrate‚ and transmit information 2. Label each part of the neuron. 1.Soma 2.Dendrites 3.Myelin sheath 4.Axon [pic] Objective II.2 Define action potential
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(3): 109-16. doi:10.2310/6620.2004.04006. PMID 15724344. Henry George Liddell‚ Robert Scott‚ A Greek English Lexicon‚ on Perseus Digital Library Alberts‚ Bruce; Johnson Alexander; Lewis‚ Julian; Raff‚ Martin; Roberts‚ Keith; Walter‚ Peter. Molecular Biology of the Cell. New York: Garland Science‚ 2002‚ pp. 62‚ 118 – 119.
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CHOLERA Causes: (reference 10) Cholera is a small intestinal infection caused by the digestion of the bacterium Vibrio Cholerae (a comma-shaped bacillus that varies in size from 1-3 µm in length by 0.5-0.8 µm in diameter)‚ present in food or water (raw shellfish‚ uncooked fruits and vegetables‚ and other foods). The disease is most common in places with poor sanitation‚ crowding‚ war‚ and famine. Transmission: (reference 1) When humans ingest cholera bacteria‚ they may not become sick themselves
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Bibliography: IB Study Guides‚ Biology‚ Oxford‚ Andrew Allott Appendix: Attached
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AP BIOLOGY- Mitosis and Meiosis Cell Division Lab Part 1-MITOSIS summary: In this experiment first the stages of an onion cell undergoing mitosis are going to be observed and every stage is going to be detected and drawn on paper. A brief description to what is going on should be attached to the pictures. This is important to understand the basics of cell division which is necessary growth‚repair
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* Biology Investigation 3.1 Porcellio Scaber (Slater‚ Woodlouse) Task 1 The crustacean Porcellio Scaber‚ or more commonly known as the woodlouse‚ is a species usually found in leaf litter or in fallen trees and bark. It feeds on detritus like many other isopods of its type‚ and is generally predated on by small mammals‚ lizards and some insects. The woodlouse habitat reflects its need to avoid warm and dry areas. The woodlouse is prone to desiccation (drying out) due to its body’s large surface
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Biology Digestion IA 13/03/2013 Jason Gao Rationale: Digestion is the chemical breakdown of food into smaller components that are more easily absorbed. Digestion is a form of catabolism: a breakdown of large food molecules to smaller ones. When food enters into stomach‚ gastric juice starts protein digestion. Gastric juice mainly contains hydrochloric acid and pepsin. The pH value of hydrochloric in the stomach
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Michelle Kim 2012.1.20 Biology Iso-osmolar Concentration of Carrot Cells Lab INTRODUCTION For a more thorough understanding of this lab introduction‚ the concepts of‚ iso osmolar‚ membrane‚ equilibrium‚ and concentration gradient evaluated. Iso osmolar can be known as the point in which the substance of experimentation faces no change despite the amount of solute inside the solvent( because the solvent and solute concentration is equal. This is where the line on a graph would cross on the
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