Introduction to Prokaryotes in Different Temperature Environments Angelina Orozco Biology 1108 Wednesday 7:30 am Abstract Prokaryotes are single-celled organisms that can survive in extreme environments. Bacteria is the more numerous type of prokaryotes. The group hypothesizes that the samples taken from different environments will all cultivate diverse morphology in fast growing rates in each environment. The aseptic technique was used to cultivate bacteria from different environments. The
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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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The question we answered was do mealworms like a dark or light environment better? First we made a hypothesis. We believed that the mealworms would like the dark environment better than the lighter one. We placed five mealworms in the same dish and half of the dish was covered so it would be dark and we left the other half light for the different environments. We did five trials and got results that were very alike. All five times there were more mealworms in the dark environment than those in the light
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Materials: A. Formulation of Hypothesis a. Apparatus - glass tube - cotton balls b. Substances - hydrochloric acid (HCl) - ammonium hydroxide (NH4OH) B. Testing the Hypothesis Concerning the Rate of Diffusion a. Apparatus - petri dish of agar-water gel with three wells b. Substances - potassium permanganate (KMnO4) - potassium dichromate (K2CR2O7) - methylene blue III. Procedure: A. Formulation of Hypothesis 1. Fasten the glass tube to a ring stand. 2. Simultaneously
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will discuss the evidence of the methods and results that were obtained . Methods and Results: To begin our experiment we obtained a petri dish from our lab instructor which contained fern spores and the food they needed to survive. We then look at the spores through the micro scope. It was to soon to see anything but little green dots. We then put our petri dishes under a light until next week. When we came in next week we observed our fern spores through the dissecting microscope. We looked
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Tetracycline and Chloramphenicol against Serratia marcescens By C. A. Bechdel Abstract The problem investigated was Serratia marcescens. We hypothesized that both Tetracycline and chloramphenicol will be effective against treating S. marcescens. The experiment was conducted with a single control group and two experimental groups. The experiment was replicated 8 times. The experiment showed that in testing the control group S. marcescens‚ chloramphenicol had a mean death zone of 30.9 mm +/- 2
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Chemistry 1225 Lab Write-Up #13 Abstract Electrolysis is a method of using a direct electric current to drive an otherwise non-spontaneous chemical reaction. During electrolysis‚ hydrogen atoms (H2) are reduced at the cathode whereas the oxygen atoms (O2) are oxidized at the anode. There were three different solutions used in the experiment in order to have a better understanding of electrolysis reactions. From each solution‚ reaction equations were produced. The reactions could be observed from
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not as effectively dried with anhydrous sodium sulfate as was desirable. Because of this‚ the TA advised adding extra filter papers‚ which led to the absorption of the exo-norborneol into them. The exo-norbornenol condensed as liquid droplets on the petri
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Lesson Organisation This will depend on the number of microscopes you have and access to a healthy culture of Daphnia. Students can readily follow this procedure working in pairs. Because of the variability of results between individual Daphnia it is not appropriate to make conclusions from one set of results‚ so each pair (or group) of students should carry out more than one investigation to contribute to the class set. One option is to record a live video of a sample Daphnia‚ during a time
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