Download Name: Pd.: ____ Chapter 10. Cell Growth and Division Section 10.1

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Chapter 10. Cell Growth and Division
Section 10.1 Cell Growth, Division, and Reproduction (p. 274-278)
1. Identify two reasons why a cell’s growth is limited.
a. ______________________________________________________
b. ______________________________________________________
2. As a cell’s size increases, what happens to the ratio of its surface area to its volume?
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3. Why is a cell’s surface area-volume ratio important?
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4. What is asexual reproduction?
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5. What is sexual reproduction?
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6. What types of organisms reproduce sexually?
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7. What is one advantage AND one disadvantage of asexual reproduction?
a. ______________________________________________________
b. ______________________________________________________
8. What is one advantage AND one disadvantage of sexual reproduction?
a. ______________________________________________________
b. ______________________________________________________
9. In a changing environment, which organisms have an advantage, those that reproduce
asexually or those that reproduce sexually? Explain your answer.
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10.
The formula for finding the surface area of a sphere, such as a baseball or basketball, is
A=4πr2. where r is the radius. The formula for finding the volume of a sphere is V=4/3πr3
a. Calculate the surface area and the volume of a basketball that has a radius of 12.2 cm and
a baseball that has a radius of 3.6 cm. Then, write the ratio of surface to volume for each
sphere. SHOW YOUR WORK!!!!
b. If the baseball and basketball were cells, which would possess a larger ratio of area of cell
membrane to cell volume?
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Section 10.2 The Process of Cell Division (p. 279-284)
1. What are chromosomes?
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2. How does the structure of chromosomes differ in prokaryotes and eukaryotes?
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3. What is the cell cycle?
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4. During which phase of the cell cycle are the chromosomes replicated?
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5. During which phase(s) of the cell cycle would you expect the amount of DNA in the cell to
change?
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6. What is the relationship between interphase and cell division?
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7. What happens during each of the four phases of mitosis, using one or two phrases to describe
each phase?
a. ______________________________________________________
b. ______________________________________________________
c. ______________________________________________________
d. ______________________________________________________
8. What do you think would happen if the spindle fibers were disrupted during metaphase?
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9. What is cytokinesis AND when does it occur?
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10.How does cytokinesis differ in animal and plant cells?
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Section 10.3 Regulating the Cell Cycle (p. 286-290)
1. Describe the role of cyclins.
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2. Describe the role of “internal regulator” proteins in mitosis.
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3. Describe the role of “external regulator” proteins in mitosis.
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4. List two times when Growth Factors are especially important.
a.
b.
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_________________________________________________
5. Define apoptosis.
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6. Why is cancer considered a disease of the cell cycle?
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7. How are the growth of a tumor and the repair of a scrape on your knee similar?
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a. How are they different?
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Section 10.4 Cell Differentiation (p. 292-297)
1. What happens during differentiation?
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2. What does “mapping” refer to in the process of cell differentiation?
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3. What are stem cells?
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4. How are embryonic stem cells and adult stem cells alike?
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a. How are they different?
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5. Give one potential benefit AND one potential issue of stem cell research.
a. ______________________________________________________
b. ______________________________________________________
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Section 11.4 Meiosis (p. 323-329)
1. Describe the process of meiosis.
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2. Describe the main results of meiosis.
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3. Suppose that an organism has the diploid number 2N=8. How many chromosomes do this
organism’s gametes contain?
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4. In human cells, 2N=46. How many chromosomes would you expect to find in a sperm cell?
__________________________________________________________
a. How many would you expect to find in an egg cell?
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5. Write a summary of each phase of meiosis.
a. ______________________________________________________
b. ______________________________________________________
c. ______________________________________________________
d. ______________________________________________________
e. ______________________________________________________
f. ______________________________________________________
g. ______________________________________________________
h. ______________________________________________________
i. ______________________________________________________
6. How does the principle of independent assortment apply to chromosomes?
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7. If two genes are on the same chromosome but usually assort independently, what does that
tell you about how close together they are?
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8. Compare the phases of meiosis I with the phases of meiosis II in terms of number and
arrangement of the chromosomes.
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