Some students measured the pH of water containing elodea‚ a common water plant. The students wanted to learn how much carbon dioxide elodea removes from the water. The students knew that decreasing levels of carbon dioxide correspond to increasing pH. Which cellular structure in elodea carries out the process that is most likely to result in increasing pH? Which structures‚ if found in a cell‚ would provide the best evidence that the cell is eukaryotic? Where in the cell do the following
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culture solution provided. Obtain the three organisms (fish and elodea) one beaker will be used as a control beaker. Obtain the volume of each organism by filling a graduated cylinder with 25 mL of water and noting if there is an increase in volume above the 25 mL line. Record volumes in table. After placing the organisms in their proper beakers cover each beaker with plastic film or petri dish. Cover the beaker containing the elodea with a coffee can or aluminum. Allow them to respire for about
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Biology 1003 - Cells: Size‚ Structure and Microscopy Introduction What is life? What are the key factors that biologists have defined that apply to every single organism on the planet? In the 17th century‚ due to the amazing advancement of the microscope‚ biologists created a theory to differentiate the living from the non-living called the cell theory. One concept from the theory is that all living organisms are composed of one or more cells. The importance of studying cells is akin to the
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dioxide and oxygen enter and exit. The hole formed between these cells is called a stoma. A stoma is just a hole. It is controlled by two guard cells‚ which change shape to either open or close the hole. Something makes water enter the cells by osmosis and so they swell up and change shape‚ but no one is quite sure of the trigger. The stomata (air holes) on plants are normally open during the day and closed at night. These stomata are found on the undersides of leaves. This is because if
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Lesson 4 Laboratory: Photosynthesis Introduction: Elodea is a species of aquatic plant often called waterweed. Like other plants‚ Elodea absorbs carbon dioxide and releases oxygen during photosynthesis. In this lab‚ an Elodea specimen is submerged in water under a lamp with a filter that can change the color of the light. We will measure Elodea’s rate of photosynthesis by measuring the amount of oxygen it produces. We will investigate the effects of light color and light intensity on Elodea’s rate
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INET Lab Report 2 Microscope and the Cell Template Student: Mavon Riley Email: shantariley@yahoo.com Date: 09/05/2014 I. Purpose of the Microscope II. The Compound Microscope EXERCISE 2.1 – Label the parts of the compound microscope 1. Eyepiece 2. Arm 3. Course Adjustment 4. Fine Adjustment 5. Revolving Nose piece 6. Objective Lenses 7. Stage Clips 8. Stage 9. Iris Diaphragm Lever 10. Condenser 11. Light Source 12. Base EXERCISE 2.2 – Calculate microscope
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Introduction Plants are considered photoautotrophs which means that they draw energy from the sun and use it to form starch molecules. The process by which this happens is called photosynthesis and results in the formation of oxygen and glucose. Plants take in carbon dioxide‚ water‚ and light then release oxygen back into the air. This process happens because of the movement of hydrogen to the hydrocarbons that are produced during photosynthesis. The discovery of photosynthesis is attributed to
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scientific report for the Part I experiment that your group conducted. Use the supplemental guide to writing a scientific report to help you produce this report. Part 1: Does light matter? Table 8.1: Group and Class rates for Photosynthesis by Elodea sprigs. |Light Condition |Final pH |Water Movement (GROUP |Water Movement (CLASS |Photosynthesis Rate |Photosynthesis Rate | | | |TOTAL) |TOTAL)
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of photosynthesis is. This is because there is a further distance for the light to each the plant in order for it to photosynthesise. Although the closer the light source is‚ the more photosynthesis‚ the light source could also kill or damage the Elodea (type of pondweed) because it could become too hot and denature its cells. But because light intensity is also a limiting factor of photosynthesis‚ the rate of photosynthesis could go up and up and reach its maximum level. So‚ if it would be shown
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POTENTIAL II OVERVIEW In this laboratory you will investigate the effect of solute concentration on water potential as it relates to living plant tissues. OBJECTIVES Before you begin this lab you should understand: - the mechanisms of diffusion and osmosis and their importance to cells - the concept of water potential - the relationship between solute concentration‚ pressure potential and the water potential of a solution - the concept of molarity and its relationship to osmotic concentration **also
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