top-side of the middle toilet seat in the women’s restroom and taking a separate swab from the keypad of the ATM machine. We them transferred our collected sample onto two separate TSA plates by swabbing the agar in a zigzag fashion‚ rotating the petri dish to spread the bacteria in various directions. This culturing technique helped us to see the full growth of the biofilm that would be growing after inoculation. After the fifth day of inoculation‚ we were able to visibly see the various bacterial
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flatworms due to their embryonic stem cells called neoblasts. We obtained the flatworms used in this experiment by first placing a few drops of spring water on a petri dish so that the flatworms will be able to survive a couple of weeks‚ and not be dehydrated. Next‚ we used a pipette to gather the flatworm and then placed the worm on the petri dish‚ with the spring water. Using a razor blade‚ the worm was cut in half into two sections of 6mm in length and 5 mm in length. The worms were measured using a
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E. coli MM294‚ and one of the tubes also received the plasmid P Vib. The test tubes were then placed in ice‚ heat shocked‚ and then a small amount of the contents were extracted and placed into two petri dishes containing ampicillin (hinders growth of bacteria). After a couple of days‚ the petri dish without P Vib displayed no signs of colonization in the E. coli
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inorganic chemical reagent and methylene blue is a chemical compound commonly used for staining because of its color blue. These three substances have 158 g/mole‚ 294 g/mole and 374 g/mole‚ respectively. A jelly-like substance‚ agar-water gel in a petri dish was used as a medium for diffusion since water and air‚ as a medium‚ are not controllable
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possible to extract a sample of planaria‚ place into a Petri dish with enough freshwater and observe under a laboratory provided microscope. While on the microscope platform‚ expose your sample to light and darkness to notice the patterns of locomotion and movement throughout the conditioning tray. Probe the individuals with an object to spot any type of distinct change in response‚ negative or positive. Tap the side and surroundings of the dish to notice if there is any different adjustment
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asleep. Remove them from the vital into a petri dish. With a soft brush‚ separate the boys from the girls. 4. Place and label males into a new vital with fly food. 5. Kill the remaining female flies by placing them in alcohol. These are assumed to be non-virgins‚ which are needless in this experiment. 6. Within the next few days‚ observe the larva that are left in the original vital. When flies emerge‚ use fly nap and separate the sexes again in a petri dish. 7. The females should be virgins if
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Activity Day 4‚ the plates (4) after 96 hours after incubation For best results‚ avoid the use of flash. Do not remove the lid of the Petri dish. Tilt the plates at slight angle. Activity Day 5‚ the plates (4) after 120 hours after incubation For best results‚ avoid the use of flash. Do not remove the lid of the Petri dish. Tilt the plates at slight angle. Post-lab Questions 1. Was any growth observed on the control plate? What would growth on the control plate indicate
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tiny test tube‚ small brown bottle‚ petroleum ether‚ plant leaf‚ dried parsley flakes‚ water‚ glass petri dish‚ stapler‚ sand‚ spatula‚ pipette‚ capillary tube‚ Whatman filter paper‚ a 50 ml chromatography solvent‚ and goggles (to be worn at all times). The steps to performing the experiment were: 1. Pour 50 ml of chromatography solvent into the tall jar and cover it with half of the petri dish. 2. Take ½ teaspoon of dried parsley flakes and ¼ teaspoon of sand in the mortar. Tear a plant leaf
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Background information Daphnia Magna is an arthropod that can grow up to 5 mm. It is a filter feeder meaning it feeds off of suspended particles in the water. Daphnia can consume particles that range from 1µ to 50µ. The heart of Daphnia is located dorsally meaning it’s located in the back. The heart rate of Daphnia can range due to many variables‚ one being temperature. "At a temperature averaging 20o C its heart rate is about 200 beats per minute."2 As the temperature surrounding the Daphnia
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each phase. Materials: The materials needed are; 1) Microscope 2) A slide containing plant cells 3) Blank paper 4) A half of a Petri dish to draw circles 5) A pen. Procedure: The steps to follow in order to properly conduct this lad are; 1) Get a microscope as directed by your teacher. 2) Get a slide from your teacher. 3) Use the half of a Petri dish to draw the circles for the representation of each phase. 4) With your blank sheet of paper each phase located on the slide is
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