(Using a stopwatch). Controlled variables: * The same height group (155-160cm) * The same weight group (45-50kg) * The same age group (15-20) * The same sex (female) * The same temperature of the ice-pack (placed in the freezer for 5 hours) * The same surrounding temperature (20-25oC) * The same body temperature (37oC) * The same material used in the icepack ( plastic and gel) * The same size and thickness of the icepack (medium sized) Fair test: This experiment
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of the solution as soon as it begins to boil. Record the data on your table. 3. Rinse pot vigorously to remove impurities‚ and allow the stovetop to cool. 4. Pour 2 cups of water in the pot add 1 tablespoon of salt and stir. Repeat steps 2 and 3. 5. Pour 2 cups of water in the pot then add 1 tablespoon of water. Repeat step 2. Observations When boiling the water it was quite pure and clear. There was no smell to it0 when boiling the salt water it was cloudy and the bottom of the pot was
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Cintya G. Alarcon Donna Biology 121 section WDF Lab Report # 1 1.On the graph paper in Figure 3‚ plot a graph of your experimental results. Choose an appropriate number scale for the Y-axis and label it Number of Infections. Choose an appropriate number scale for the X-axis label it Number of Exchanges. 2. In a few sentences‚ summarize the results of the experiment. In your summary‚ include data from your summary chart and graph. Statements of results should include only facts—no interpretation
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045.45 X PCT One Ocular Division = 0.22 µm Size of Specimen = 5 ocular divisions Conversion of Ocular Divisions to ‘µm’ = (5 * 0.22) µm = 1.1 µm Size of Drawing = 15.4 cm Conversion of ‘cm’ to ‘µm’ = (15.4 * 1‚000) = 15‚400 µm Magnification = Size of Drawing / Size of Specimen = 15‚400 / 1.1 = 14‚000 X DCT One Ocular Division = 0.22 µm Size of Specimen = 5 ocular divisions Conversion of Ocular Divisions to ‘µm’ = (5 * 0.22) µm = 1.1 µm Size of Drawing = 15.9 cm Conversion of ‘cm’
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Chapter 11: Cell Communication Cell-to-cell communication is essential in multicellular organisms. They must communicate to coordinate activities such as growth and development‚ and reproduction. In addition unicellular organisms communicate with each other. Signals may use light‚ or touch but we will focus on chemical signals. 1. External signals are converted to responses within the cell a. Evolution of cell signaling i. In yeast a cells and αcells both secrete chemicals
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AP Statistics Name ____________________________________________ 11/6/07 Wood/Myers Period _______ Test #5 (Chapter 5) Honor Pledge ___________________________________ Part I - Multiple Choice (Questions 1-10) – Bubble the answer of your choice on the scantron form. 1. Who makes more mistakes on their income tax forms: accountants or taxpayers who prepare the form themselves? A random sample of income tax forms that were prepared by accountants was drawn from IRS records
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sunflower. The sunflower had the brightest and most appealing color‚ and although the scent was not extremely strong‚ there was still enough of a scent to be an adjunct in the attraction of the bird‚ insect‚ or bat to the sunflower itself. 5. Which of the flowers you observed today will have the lowest chance of being pollinated? Explain your choice. Of the observed flowers today‚ the one with the lowest chance of being pollinated would be the lily. The lily is colored‚ but not to a
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nuclei * fungus is all haploid‚ only diploid life cycle is the zygote. zygote undergoes meiosis to produce haploid spores for dispersal * molds: fungi in vegetative state (Deuteromycota/ fungi imperfecti * fungi are classified into 5 phyla * Chytridiomycota: spores with flagella * the rest named after the reproduction structures formed * Zygomycota: produces zygosporangia * bread molds: Rhizopus * 3 types of hyphae *
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adding new cells in the cell division. Another reason is so that chromosomes are equally distributed among two daughter cells which helps in maintaining the similar amount of genetic material in all the body cells. 5. List one way mitosis and meiosis are similar. One way mitosis and meiosis are similar are that they are both types of cell division‚ and both produce new cells. They can do this process by going through the same exact stages which are
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Unit 7 Discussion forum Question 1: Write a sentence for each of these mechanisms describing the manner in which the DNA can betransferred from one cell to another Transformation is one of three processes for horizontal gene transfer by which genetic material passes from bacterium to another. “It is the acting of altering a genetic cell resulting from putting together exogenous genetic material from its surroundings through the cell membrane(s)‚”(Wikipedia‚ 2017‚ p.1). Conjugation: This is the
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