CORE PRACTICAL ONE Describe how the effect of caffeine on heart rate in Daphnia can be investigated practically‚ and discuss whether there are ethical issues in the use of invertebrates. Daphnia‚ the water flea‚ is a small freshwater crustacean which lacks physiological methods of maintaining a constant body temperature. This means that if the environmental temperature changes‚ its body temperature does so too and its metabolic rate will be expected to rise or fall accordingly. So the temperature
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M09/4/BIOLO/HPM/ENG/TZ1/XX+ 22096007 Biology HigHer level PaPer 1 Wednesday 6 May 2009 (afternoon) 1 hour INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. 22096007 2209-6007 18 pages © International Baccalaureate Organization 2009 – 2 – 1. What does the following scatter graph show
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Cell structure and organization • Chloroplasts o Site of photosynthesis where light energy is absorbed o Consist of grana which are stacked up to increase surface area for absorption of light o Only present in plant cells • Cell membrane (plasma membrane) o Lipid bilayer that surrounds the cell‚ interspersed with protein molecule o Presence of temporary pores o Selectively permeable Controls movement of substances o Diffusion‚ osmosis and active transport can therefore take place o Prevent outflowing
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Bio Review – Cells Cell Theory 2.1.1 * All living things are made of cells * Smallest unit of life * Existing cells from pre-existing cells * Contain a blueprint for growth‚ development‚ behavior * Site of all chemical rxns 2.1.2 * Abiogenesis * Living from non-living matter * Robert hook * Compound microscope + observed cork “cells” * Anthony van Leeuwenhoek * Observed blood cells and other “living” cells * Louis Pasteur * Proved
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| The effect of salinity on osmosis of solanum tuberosum L.(potatoes) | Biology HL Internal Assessment – Year 10 | | Teresa Nguyen | | Table of Contents 1 DESIGN 2 1.1 Defining the problem 2 FOCUS QUESTION 2 HYPOTHESIS 2 BACKGROUND INFORMATION 2 INVESTIGATION VARIABLES 3 1.2 Controlling Variables 3 TREATMENT OF THE CONTROLLED VARIABLES 3 CONTROL EXPERIMENT 4 1.3 Experimental Method 4 MATERIALS 4 RISK ASSESSMENT 5 METHOD 5 2 DATA COLLECTION and PROCESSING 7 2.1 Recording Raw
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Sephrael March 3‚ 2011 AICE English Literature Songs of Ourselves: CIE Anthology of Poetry in English Because I Could Not Stop for Death In "Because I Could Not Stop for Death‚" the author is taken on a metaphorical "ride" past her entire life and to her end by a personified death. Symbolism‚ personification and alliteration are used to highlight the fact that she has come to accept fate as natural and is even happy with her new‚ "eternal‚" life. My Parents Kept Me from Children Who
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1. What “language” must a microcomputer talk in order to interface with the Internet? Ans= some form of TCP/IP 2. What kind of applications might use a sensor to local area network layout? Ans= Assembly line robotic control devices‚ oven temperature controls 3. Why is network architecture useful? Ans= allows for compatibility between products and allows products to interoperates. 4. List the seven layers of the OSI model. Ans= *Application *Presentation *Session *Transport *Network *Data link *Physical
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Biology 1010 is a course that introduces students to the basic biological phenomena in all living organisms. It focuses on the different molecular levels of organization‚ heredity in evolution‚ genetics and reproduction. Through this course‚ I was able to master three essential concepts such as Mendel’s Law of Segregation‚ enzymes‚ and photosynthesis. Gregor Mendel was an Augustinian monk that argued that parental traits are passed on to their offspring discrete “heritable factors”. Heritable factors
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longer complementary. 2b. The curves level out as the same value as the RoR us quicker so the active sites get full quicker‚ the same thing happens at 27 but it happens slower due to less heat and therefore less kinetic energy‚ the mass is exactly the same. 3a. There is a lower activation energy so the molecules are brought tighter together. 3bi. 4=48 5=57 8=53 3bii. At pH 4 there is an increase in the kinetic energy up to the optimum level‚ this is where the enzyme is working
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increasingly complex models at all levels of biology. This paper shows the innovations in studying biology. It discusses the biological level of organization and it also describes the model that has seem to be found on the said level. It was also discussed on this paper that the complex models that was developed for the past few years must have the new methods and techniques to model it. The journal tackles the level of organization‚ multi-scale in modelling in biology‚ MD of ion channels and heart modelling
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