possesses a heart‚ an exoskeleton‚ and a digestive tract (outlined in yellow). Lastly‚ we knew that the Planaria is a flat worm that reproduces sexually and has an “ocelli” which responds to light. Methods: 1. Set up the lap table with four microscopes all with the magnification at 40x. 2. Gather three flat slides‚ one depression slide and four slip covers. 3. Using a pipette‚ take a sample of Planaria and place the sample on one of the flat slides. 4. Take a slip cover and place it over the
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Biology 2020 Microbiology Study Guide for first exam The history and scope of microbiology 1) What are the organisms/entities of study in the field of microbiology? * Bacteria * Archaea * Eukarya * Viruses and Prions (Acellular entities) 2) Who was the first human to publish extensive descriptions of microorganisms? * Antony van Leeuwenhoek 3) How did Louis Pasteur dismantle the theory of spontaneous generation in bacteria? * Swan neck flask experiment: Flask
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salt water then... the cell will shrivel up The independent variable is the salt solution and distilled water The dependent variable is whether the cell shriveled or not Materials: microscope thin onion strip glass slide small plastic cover slip iodine stain pipette tweezer paper towel strip small beaker Salt solution STEPS 1. Carefully remove the outer
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SCIENCE PROCESS SKILLS Basic Science Process Skills: 1. Observing - using your senses to gather information about an object or event. It is description of what was actually perceived. This information is considered qualitative data. 2. Measuring - using standard measures or estimations to describe specific dimensions of an object or event. This information is considered quantitative data. 3. Inferring - formulating assumptions or possible explanations based upon observations. 4
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crossover frequency? e) Procedure e.i) Circular dishes were cut into four sections‚ the tan types were placed diagonally from each other and the wild types were placed diagonally from each other e.ii) Cross over frequencies were examined under a microscope and the order of asci that occurred (2:2:2:2‚ 2:4:2‚ 4:4) were recorded 2) Methods a) Set up a.i) The crossing over was set up using four samples of two different types of Sordaria (tan and wild) a.ii) All tools that were used were sanitized
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Benedict’s test‚ the solution inside of the bag (glucose)‚ was originally clear‚ but after the Benedict’s test turned a strong orange color‚ finally ending with a final color of dark blue-black. In experiment 5.2 while observing the ox blood under the microscope the cells underwent either lysis or shriveled up. When observing the Elodea cells in distilled water and separately in salt water‚ the appearance and condition of the cell drastically changed. When the Elodea cell was placed into the distilled water
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the solution of the water is hypertonic meaning there is a higher concentration of solutes outside of the cell. To test my prediction my lab partners conducted the Brownian movement. Materials: Bon Ami scouring powder‚ carmine red and Indian ink Microscope slides and cover slip Dropper bottles with distilled water Spatulas
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wash the dye off the unstained cells. Finally‚ a red dye called safranin was used to stain any gram-negative cells present so that they were visible. Once the gram stain procedure was complete‚ the gram-positive bacteria appeared purple under a microscope while gram-negative cells appear pink or red. The purpose of this lab was to differentiate bacteria based on the cell wall and to differentiate whether the bacteria was gram-positive or gram-negative. Gram-negative bacteria do not retain the violet
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contrast in color with their surroundings‚ so they are more readily visible. Certain stains can also be used to identify internal structures of the cell‚ which would otherwise be unseen. Further‚ in order to use the oil immersion objective of the microscope and thereby obtain the greatest degree of magnification‚ it is convenient to use stained preparations rather than wet mounts.1 Although bacteria do not appear greatly different from their
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Unit 1: Unit code: QCF Level 3: Credit value: Fundamentals of Science R/502/5536 BTEC National 10 Guided learning hours: 60 Aim and purpose The aim of this unit is to enable learners to develop the practical techniques necessary to pursue a career as a laboratory technician. Learners will investigate the quantities necessary in chemical reactions‚ the structure and functions of cells‚ the calorific value of different fuels and develop skills in communicating scientific information. Unit
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