* Topic 2: Cells * 2.1 Cell theory * 2.1.1 * Outline Cell Theory 1. All living organism are composed of cells 2. Cells come from pre-existing cells 3. Cells are the smallest unit of life * * 2.1.2 * Discuss the reasons for cell theory 1. When organism are looked at under a microscope‚ they are consistently made up of cells 2. Cells carry out asexual reproduction – called Mitosis 3. Cells are the smallest unit of organisms that can carry out all
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Osmosis is the diffusion of a solvent across a selectively permeable membrane that occurs in response to differences in solute concentrations (Allen and Harper 2014).Osmosis can fall under the category of passive transport which does not require energy. With osmosis being a type of diffusion it is viewed as molecules moving from a high concentration to a low concentration. To further explain if there is a low water concentration‚ high amounts of solutes will be present. Water will most likely move
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BIOLOGY PLAN AND DESIGN LAB Date: / / Syllabus Topic: Hypothesis: A glass of milk lasts longer in cold temperatures. Aim: To determine a better range of temperature for storing a glass of milk. Apparatus and Materials: • 2-100cm3 beakers • 2-500cm3 beakers • Milk • Ice • Hot water • Marker Method: 1. Obtain 2 clean 100cm3 beakers and 2 clean 500cm3 beakers. 2. Add 50cm3 of milk to each 100cm3 beaker. 3. Label the 100cm3 beakers‚ A and B. 4. Label the 500cm3
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Abstract - The experiments done in class served for multiple purposes. It helped identify that diffusion is the shifting of molecules from one part to another that takes no energy‚ and that osmosis is just the flow of water through the cell membrane. The main purpose of the first experiment was to examine the movement of H2O and other materials in living and simulate systems. This was done through the dialysis tubing to mimic the cell membrane and measure the change of mass inside the tube filled
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3DIFUSSION IN AGAR CUBES – LAB REPORT Research Question: What is the effect of surface area on volume ratio on the rate of diffusion of pigment from the agar cube measured by percentage volume of diffusion over time? Background Research: Diffusion is the passive movement of molecules or particles along a concentration gradient‚ or from high to low concentration regions. Essential towards living organism’s functions‚ as it describes how the nerve cells are able to communicate with each other‚ through
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DP Physics IA Thermal physics: Specific Heat Capacity of Metals Introduction: In this experiment we are going to measure the specific heat capacity of a unknown metal. To measure the specific heat capacity we will heat up the metal to certain temperature and release the metal in beaker filled with water. By knowing the mass and temperature of water filled in beaker‚ we will be able to calculate the specific capacity of unknown metal by change in temperature of beaker willed
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temperature)‚ and 70°C. This investigation tested the hypothesis: The rate of osmosis will increase as the temperature increases 2x2x2cm cubes of potato were weighed and then placed into 100mL of 10% NaCl solutions for 10 minutes. After 10 minutes the cubes were again weighed to determine the amount of mass that they lost/gained and thus get an indication of the rate of osmosis. The results collected showed that the rate of osmosis was highest in the 70°C solution and lowest in the 20°C solution. From
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AP Bio p. 6 December 8‚ 2011 AP Biology Lab 5: Cellular Respiration Introduction/Lab Objective: In this lab we are testing how the process of cellular respiration is affected by temperature‚ and also how it is different between germinating and non-germinating peas. Cellular respiration is a catabolic process (breaks down organic material into usable cell energy) that produces ATP. The electron receivers are inorganic. Cellular respiration releases energy from organic material through chemical
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1P Paper Towel Absorbency Experiment Write-Up Purpose: The purpose of this experiment is to conduct a valid experiment‚ realize that the way I conduct an experiment influences the data‚ and I want to know which paper towel has the higher absorbency times. My hypothesis is that bounty will be the quicker picker upper Materials and Methods: As a class we chose that our control out of the brands provided (Bounty‚ Viva‚ Wal-Mart‚ and the School brand) would be the Schools brand of paper towel
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Terra shiles English 232 Mullinax September 18‚ 2013 The Book vs. The Movie The Legend of Sleepy Hollow written by Ivring was a very interesting story that is well known around the world today. The movie was far more entertaining than reading the book If I must say so myself. Tim Burton gave a new spin to The Legend of Sleepy Hollow. I myself have always enjoyed anything written or directed by Tim Burton because of his sense of horror and his creative abilities. The characters are redefined
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