DNA cell wall ribosomes c Explain the endosymbiotic theory of the origin of

Dna cell wall ribosomes c explain the endosymbiotic

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differs in prokaryotes and eukaryotes. - DNA - cell wall - ribosomes c. Explain the endosymbiotic theory of the origin of eukaryotic cells and discuss an example of evidence supporting this theory. 3. Water potential in potato cells was determined in the following manner. The initial masses of six groups of potato cores were measured. The potato cores were placed in sucrose solutions of various molarities. The masses of the cores were measured again after 24 hours. Percent changes in mass were calculated. The results are shown below. Molarity of Sucrose in Beaker % Change in Mass 0.0M 18.0 0.2 5.0 0.4 -8.0 0.6 -16 0.8 -23.5 1.0 -24 (a) Graph these data on the axes provided. From your graph, find the apparent molar concentration (osmolarity) of the potato core cells. (b) What are the components of water potential, and why is water potential important for the movement of water in plants? (c) Predict what would happen to typical animal cells placed in 0.0 M and 1.0 M sucrose solutions, and explain your prediction.
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4. Imagine a spherical cell with a radius of 10 μm. Show your calculations. What is the cell’s surface area in μm2 ? Its volume in μm3? What is the ratio of surface area to volume for this cell? Now do the same calculations for a second cell, this one with a radius of 20 μm. Compare the surface-to-volume ratio of the two cells. How is this comparison significant to the functioning of cells? (Note: For a sphere of radius r, surface area = 4πr² and volume = 4/3πr³. Remember π is 3.14.) 5. Prokaryotes are found throughout the biosphere. Answer two of the following. a. Provide three examples of adaptations found in various prokaryotes. Explain how these three adaptations have ensured the success of prokaryotes. b. Discuss how prokaryotes early in Earth’s history altered environments on Earth. c. Discuss three ways in which prokaryotes continue to have ecological impact today.
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  • Fall '16
  • idk
  • Bacteria, Cell nucleus, Cellular Organization & Transport

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