be controlled by closing all doors and windows in the classroom‚ in order to maintain the room temperature and not disrupt the experiment. Apparatus: - Timer - 1 sheet of squared paper (square’s area 1cm2) - 1 non-heated lamp - 1½ of a Petri dish - 1 ruler - 1 plastic spoon - 5 Porcellio scaber Method: 1. Collect the materials listed above. Next‚ plug-in the non-heated lamp and position it so that it is 19cm away from where the Porcellio scaber will be placed (measure this distance
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The termites’ reaction to pheromones in different colors of ballpoint pen ink. Abstract: We conducted the experiment with termites in order to determine how they react to pheromones present in different colors of ballpoint pen ink. The experiment consisted of two parts: in first part we used a ballpoint pen with blue ink‚ in second – a ballpoint pen with red ink. The reaction of termites was measured by their performance in 1 minute. Every termite in experimental group went through 3 tries in each
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a piece of paper towel to fit inside a petri dish. 2. Place the paper towel inside the petri dish and moisten with water. Started 3/1/2013.100 seeds. 3. Sprinkle all of the seeds onto the paper towel and then cover the petri dish. 4. Place seeds near a warm window with indirect light. 5. Observe seeds for germination each day and moisten the paper towel as needed. 6. Once the majority of seeds have germinated‚ remove the lid of the petri dish and count the number of seedlings that
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Independent Variable: Temperature (in Celsius) Dependent Variable: Amount of prodigiosin produced Methods/Procedures see attached lab‚ procedures‚ page 2527 Data see attached lab‚ data‚ page 25‚ 26 Analysis 1. You should label the bottom of a petri dish instead of the top because this
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Chloe Lindbom Regeneration of a Planarian Over Time Erin Davis Biology Mrs. Werfelman 5th Hour 10/09/2014 10/20/2014 Background: The planarian‚ also known as the flatworm‚ is a creature that live all over land‚ oceans‚ and freshwater. (Biggs‚ A.‚ Gregg‚ K.‚ Hagins‚ W.‚ Kapicka‚ C.‚ Lundgren‚ L.‚ Rillero‚ P.‚ 2002) The planarian has a threebranched digestive cavity. (Alvarado‚ 2004) Planaria range from 1/8 to 1 inch. (Alvarado‚ 2004) The planarian can be cut into many pieces and each piece will grow
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Review all chapters in your exercise manual beginning with the introduction INTRODUCTION: (Covered 9.4.14 II Week 1) Biosafety levels1: basic level of containment. Hand washing or wearing gloves 2: Appropriate for working with human body fluids. Autoclave‚ sharps containers‚ lab coats 3: appropriate for working with pathogens that can be transmitted via respiratory route. Self-closing‚ double doors and sealed windows 4: Highest level. Aerosol pathogens; pathogens with no vaccine/treatment. Separate
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ABSTRACT The effect of molecular weight on the diffusion of substances were tested through the use of agar-water gel with three wells placed in a petri dish. Drops of three different substances namely: Potassium permanganate (KMnO4)‚ Potassium dichromate (K2Cr2O7) and Methylene Blue were placed in the wells of the agar-water gel in the petri dish. The diameter of the diffused substance was noted every 3 minutes for 30 minutes. The Potassium permanganate (KMnO4)‚ which has the smallest molecular
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water across the cell membrane. Hypothesis: That the potatoes will either increase or decrease in mass‚ due to the effect of the different concentrations. Osmosis will occur. Apparatus: * Fresh potatoes * Apple corer * Scalpel * Petri dishes X 10 * 50ml measuring cylinder * Distilled water * Paper towelling * Sucrose solutions: * 1.0M * 0.8M * 0.6M * 0.4M * 0.2M Method: Day 1 1. A cylinder was poked out of the potato with the apple corer
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2013-2014 ABSTRACT The effect of molecular weight on the rate of diffusion was assessed using the agar-water gel test. The agar-water gel set up was composed of a six petri dish of agar-water gel containing two wells. Pinch of potassium permanganate (KMnO4) and methylene blue (C16H18N3SCl) were simultaneously introduced to each dish and measured the distance and its rate. Methylene blue‚ having the largest molecular weight‚ displayed the smallest diameter 15.67 and diffused at the slowest rate (0
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Bacterial Smears Are Fixed before Staining to? Answer It is important to heat fix the bacterial smear before staining so as to‚ kill the bacteria‚ firmly adhere the smear on to the microscopic slide to prevent washing off during staining‚ and to allow the sample to readily take up the stain. Reference: www2.hendrix.edu What is the purpose of heat- fixing the smear? It helps the cells adhere to the slide so that they can be stained. The purpose of heat fixing is to kill the organisms without
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