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Chapter 10: Cell Cycle
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3. Ratio of Surface Area to Volume in Cells Cell Size Surface Area (length x width x 6) Volume (length x width x height) Ratio of Surface Area to Volume Section 10-1
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6. Concept Map includes is divided into is divided into Section 10-2 Cell Cycle M phase (Mitosis) Interphase G 1 phase S phase Prophase G 2 phase Metaphase Telophase Anaphase
23. Figure 10–8 Effect of Cyclins A sample of cytoplasm is removed from a cell in mitosis. The sample is injected into a second cell in G 2 of interphase. As a result, the second cell enters mitosis. Section 10-3
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26. Video 2 Click the image to play the video segment. Video 2 Animal Cell Cytokinesis
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28. Section 1 Answers Interest Grabber Answers 1. On a sheet of paper, make a drawing of a cell that has the following dimensions: 5 cm x 5 cm x 5 cm. Your partner should draw another cell about one half the size of your cell on a separate sheet of paper. 2. Compare your drawings. How much longer do you think it would take to get from the cell membrane to the center of the big cell than from the cell membrane to the center of the smaller cell? It would take twice the amount of time. 3. What is the advantage of cells being small? If cells are small, materials can be distributed to all parts of the cell quickly.
29. Section 2 Answers Interest Grabber Answers 1. Why is the cell cycle called a cycle? It represents recurring events. 2. Why do you think that it is important for a cell to grow in size during its cell cycle? If a cell did not grow in size, each cell division would produce progressively smaller cells. 3. What might happen to a cell if all events leading up to cell division took place as they should, but the cell did not divide? Students may infer that a cell that undergoes all sequences of the cell cycle would grow increasingly larger—to a point at which the cell could no longer exchange materials with the environment efficiently enough to live.
30. Section 3 Answers Interest Grabber Answers 1. How do you think the body repairs an injury, such as a cut on a finger? The cut is repaired by the production of new cells through cell division. 2. How long do you think this repair process continues? Cell division continues until the cut is repaired. 3. What do you think causes the cells to stop the repair process? Students will likely say that when the cut is filled in, there is no room for more cells to grow.