Osmosis Lab Report The essential focus of the experiment was to acquire data for the mass change resulting from osmosis in order to determine the carbohydrate solution of the carrot cells. The carrots were a vegetable used within the experiment with a carbohydrate solution around .5 M. The hypothesis is if there are carrots in different carbohydrate solutions then there will be a percent change in mass. The carrots have large vacuoles that hold water‚ this allows the mass to increase when the hypertonic
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Interreach variability and correlation analyses between biotic and abiotic factors of the Old Chelsea stream BIO2129 Section Demonstrators: October 1‚ 2014 Department of Biology Hypotheses Water quality parameters such as pH‚ dissolved oxygen‚ seston‚ water temperature etc. are important variables in the abundance and diversity of benthic macroinvertebrates of the Old Chelsea stream. Therefore‚ it can be hypothesized that pH and dissolved oxygen have a direct correlation on biotic factors
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Exercise 1 – Potato Change in Mass versus Sucrose Concentrations Introduction: This exercise involves estimating the osmotic concentration of potato tuber cells by using a change in mass method. The null hypothesis states that there will be no change of mass of the potato disks after they have been incubated in any sucrose solution. This means that the concentration of sucrose that the potatoes are in will no effect the movement of water in or out of the potato cells. However‚ the alternative hypothesis
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What are the dependent and independent variables? What are your controls - both positive and negative? How will you collect your data? How will you present your data (charts‚ graphs‚ types)? How will you analyze your data? Observations 1. A plant grows three inches faster per day wWhen Sally eats healthy foods and exercises regularly‚ her blood pressure is 10 points lower than when she does not exercise and eats fatty foods. 4. The Italian restaurant across the street closes at 9
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Length of Balloon (0.1cm) Trial: Time: Seconds (0.1cm) 30 1 2.0 30 2 2.1 30 3 1.9 30 4 2.2 30 5 1.8 mean: 2.0 Displacement (meters and centimeters) (1) Work (0.1) Power (0.1) 11 m‚ 18 cm 559 279.5 11 m‚ 32 cm 566 269.5 10 m‚ 33 cm 516.5 271.8 11 m‚ 32 cm 566 257.3 10 m‚ 32 cm 516 286.7 10 m‚ 89.4 cm 544.7 273.0 Veloctiy (m/s) Displacement/Time Acceleration (m/s/s) Velocity/Time Trial 1 11.18/2.0 = 5.59 5.59/2.0 = 2.80 Trial 2 11.32/2.1 = 5.39 5.39/2.1 = 2.57 Trial 3 10.33/1.9 = 5.43 5.43/1
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b 1 Exercise 1: Dissolved oxygen is oxygen that is trapped in a fluid‚ such as water. Since virtually every living organism requires oxygen to survive‚ it is a necessary component of water systems such as streams‚ lakes and rivers in order to support aquatic life. The dissolved oxygen is measure in units of ppm—or parts per million. Examine the data in Table 2 showing the amount of dissolved oxygen present and the number of fish observed in the body of water the sample was taken from; finally
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Rousselle Molina Ms.Moraima Group 2; HW 1 9-25-12 EVOLUTION; NATURAL SELECTION I.ABSTRACT: As we all know‚ evolution is a change in population over a period of time. Natural Selection as its own mechanism takes place for survival of the offspring from varying changes of the environment. One good example of natural selection is the population of peppered moth predominant in England. During pre-industrial revolution‚ there were highly significant light colored moths that
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Discussion and Conclusion In this lab‚ a submarine Adventure: Density Saves The Day‚; I had made many of the calculation for the best result of the lab. My calculations section contains: the volume of the unknown metals‚ where I figure out the volume of each metal so that I will be able to determine its density in order to find its identity; the density of unknown metals‚ where I figure out the density of each metal so that I will be able to determine its identity; percent error between known
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Introduction In this experiment I aim to find out if caffeine has an effect on the heart rate of daphnia. Daphnia are water fleas that have a sort of heart that we can see in magnification. We can count the number of heart beats in a minute of a regular daphnia and try and get a new one with the same specifications as the old one that may have died. It is also a good idea to get a new one as we want to see how much it affects it from ordinary instead of adding the caffeine one after another
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Lab 1 Installing Servers This lab contains the following exercises and activities: Exercise 1.1 Exercise 1.2 Lab Challenge Performing a Clean Installation Installing Windows Server Migration Tools (WSMT) Accessing a WSMT Distribution Point BEFORE YOU BEGIN The lab environment consists of computers connected to a local area network. The computers required for this lab are listed in Table 1-1. Table 1-1 Computers Required for Lab 1 Computer Operating System Computer Name New server
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