Natalia Wierzchon A.P. Biology Lab: 1. Osmosis 09/10/2010 I. Introduction a. Purpose: The purpose of this lab was to observe the diffusion process of water‚ osmosis‚ as well as create an understanding of water potential‚ the basis of osmosis. The experiment proved how water molecules in a solution are able to move from an area of low solute concentration‚ high water concentration‚ to an area of high solute concentration‚ low water concentration‚ diffusing “down” the water gradient.
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1 of 22 4.0/ 4.0 Points Who proposed that all of the present continents were once joined together in a single supercontinent called Pangaea? A.Alfred Wegener B.Charles Darwin C.Arthur Holmes D. Harry Hess Answer Key: A Question 2 of 22 4.0/ 4.0 Points The scientific community rejected the theory of plate tectonics because Alfred Wegener could NOT A.identify a mechanism to move the continents. B.disprove competing theories that were not accepted by scientists. C.find
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CHM130 Lab 2 Measurements: Accuracy and Precision A. Data Tables (36 points) Place your completed data tables into your report here: Data Table 1 Measurement Data Length of aluminum plastic packet 5 cm Height of aluminum plastic packet 6.5 cm Temperature of faucet water 23°C Temperature of ice water 11°C Volume of water in 10-mL graduated cylinder 10 ML Volume of water in 50-mL graduated cylinder 10 ML Data Table 2 Measurement Data Inside diameter of 50-mL graduated cylinder 2.5 cm
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PART A 1. Buying a new PC. Low Yat Plaza in Jalan Bukit Bintang is a well-known place for computer sales. Assume that you want to buy a new PC for your personal use. Your task is to: i. Make a list of your hardware and software requirements‚ be as specific as possible. (For software‚ you must at least choose 1 type of operating system and 3 application programs.) HARDWARE * CPU (Central Processing Unit): responsible for handling all instructions it receives from hardware components
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Simple and Fractional Distillation Experiment II Stancy Saji‚ 18 September 2014 Purpose Experiment II involved two kinds of distillation techniques: simple and fractional. Simple distillation was done to separate ethyl acetate—which has a usual boiling point of 77º—from a less volatile component‚ while fractional distillation was done to distinguish an ethyl acetate/n-butyl acetate mixture‚ which has boiling points of 77º and 125 º‚ respectively. Results and Discussion As previously stated the
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7-2 Notes Eukaryotic Cells 1. Eukaryote cells are divided into two parts Nucleus Cytoplasm Portion outside the nucleus where organelles reside Nucleus 2. Contains most of the cell’s DNA 3. DNA is the code for making proteins 4. Surrounded by a double membrane called the nuclear envelope 5. Contains chromatic‚ which consists of DNA bound to protein Condenses during cell division to form chromosomes 6. Nucleolus – small dense region in nucleus where the assembly of ribosomes begins Ribosomes 7. Small
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Alvaro Comino LAB REPORT 4 CONNECTIVE TISSUE (SPECIALIZED) I. Abstract In this experiment‚ identification and classification of different types of connective tissue was performed. Also‚ cells and extracellular matrix was to be identified in them. For this‚ different already prepared slides were chosen and observed under the microscope to then identify the different parts. II. Introduction Apart from the bone and cartilage‚ the rest of the specialized connective tissues are divided
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Gen Bio II‚ Spring 2013 Extra Credit Quiz 2 1) If two modern organisms are distantly related in an evolutionary sense‚ then one should expect that A) they live in very different habitats. B) they should share fewer homologous structures than two more closely related organisms. C) their chromosomes should be very similar. D) they shared a common ancestor relatively recently. E) they should be members of the same genus. 2) Within a few weeks of treatment with the drug 3TC‚ a patient’s
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Multiple-Choice Questions Chapter 2: Marine Ecology 1. Which environment has historically been the most stable? w. desert x. coral reef y. tundra z. tropical rain forest 2. Most sea life is found in which area? w. On or above continental shelves x. In trenches y. Along mid-ocean ridges z. Near deep-sea hydrothermal vents 3. Coastal upwelling results in ________. w. carbon dioxide-rich water surfacing x. warm water surfacing y. mixing of salt and freshwater z. lower high tides 4. The yellow-green
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Unit 2 Bullet Point Handouts Tests for closely-related species (Compare) DNA; Sequence of bases/nucleotides; DNA hybridisation; Separate DNA strands / break hydrogen bonds; Mix DNA/strands (of different species); Temperature/heat required to separate (hybrid) strands indicates relationship; Compare same/named protein; Sequence of amino acids /primary structure; Immunological evidence – not a mark Inject (seahorse) protein/serum into animal; (Obtain) antibodies/serum; Add protein/serum/plasma
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