What is their color What happens to the streaming over the course of time How

What is their color what happens to the streaming

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What is their color? What happens to the streaming over the course of time? How can you estimate the velocity of cytoplasmic streaming inside the Elodea cells? Fall 2012 Ex 2 Analysis Page 1 of 2
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EXERCISE 1 Page 2 of 2 11) During this lab, you observed the guard cells in a Kalanchöe leaf. Please answer the following questions about your observations. 2 points What structures are prominent inside the guard cells in the Kalanchöe leaf? What is the name of the central opening and what function does it play? How does it change shape over the course of the day? 12) The function of epithelial cells to provide a barrier between the outside world and the inside of the organism. What about the shape of these cells is advantageous for this function? 2 points 13) Use your measurements of length and width of the Paramecium in the permanent dry mount to determine the mean and standard deviation for both the length and width of the Paramecia you observed. 2 points 14) How does the flatness of a single-celled Paramecium affect the cell’s surface area-to-volume ratio? Why is there an upper limit to cell size? What are adaptations seen in organisms to increase the surface area-to-volume ratio? 2 points 15) Based on your experience in this exercise, report in tabular form at least two advantages and two disadvantages of permanent dry mounts versus wet mounts for determining features of specimens as observed by brightfield microscopy. 2 points Spring 2012 Ex 2 Analysis Page 2 of 2
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  • Spring '08
  • Unknown
  • Bacteria, Surface-area-to-volume ratio, Elodea Cells

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