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Overview

This week you learned about the role of firewalls in protecting Linux workstations and servers by explicitly permitting or denying traffic based on specific attributes. In this assignment you will build on your lab experience by further exploring the functions and features of iptables and firewalld, and then you will return to the lab to complete a self-directed hands-on challenge.

Preparation

• Use the Internet to research differences between iptables and firewalld.
• Use the Internet to determine how to drop ICMP requests using firewalld on the TargetLinux01 machine.

Assignment: (references)

·  Compare and contrast firewalld’s zones and services to iptables chain rules.

·  Recommend a specific firewall as your preference for deployment in an enterprise that requires the highest levels of information security, and include your rationale for that preference. Please be sure to properly cite applicable resources.

LABORATORY EXERCISE QUESTIONS

1. Why are spindle fibers important for mitosis? (5 points)

2. State the four bases that make up DNA. (4 points)

3. What are the two base pairings within DNA? (2 points)

4. Answer the following questions:

a. Define the term crossing over. (2 points)

b. Explain why crossing over is important in meiosis. (3 points)

5. What are the two main differences between mitosis and meiosis? (4 points)

6. Answer the following questions:

a. Explain the difference between mitosis and cytokinesis. (4 points)

b. During which phase of the cell cycle does mitosis occur? (2 points)

c. During which phase of the cell cycle does DNA replication occur? (2 points)

7. Explain the differences that occur during cytokinesis in plant and in animal cells. (5 points)

8. Refer to the images below, labeled A through E. Each image details a stage of the cell cycle for a cell undergoing mitosis. Place the images in correct order by placing the letters in the correct sequence, according to the stages of mitosis. (5 points)

9. Refer to the image below. What stage of mitosis is the cell identified below undergoing? (5 points)

10. Refer to the images below. Place the cells identified with the letters A through E in correct order for a cell undergoing mitosis. (5 points)

11. Which phase of cell division is shown in the center cell of the image below? (5 points)

12. What three components make up the structure of DNA? (3 points)

13. Describe the differences between chromatin, chromosomes and sister chromatids. (3 points)

14. Refer to the images to identify cytokinesis either by the process of a cleavage furrow or cell plate. (3 points)

15. Which stage of meiosis is shown in the image below? (5 points)

16. What are haploid cells, and what are diploid cells? Provide an example of each cell type in the human body. (6 points)

17. Why is it important that haploid gametes be produced in animals? (5 points)

18. During which stage of meiosis do homologous chromosomes separate? (2 points)

APPLICATION QUESTION

19.  (Application) How might the information gained from this lab pertaining to mitosis and meiosis be useful to you, or how can you apply this knowledge to your everyday life as a non-scientist? The application will be graded according to the rubric below. (20 points)

LAB 6 

16. What are haploid cells, and what are diploid cells? Provide an example of each cell type in the human body. (6 points)
17. Why is it important that haploid gametes be produced in animals? (5 points)
18. During which stage of meiosis do homologous chromosomes separate? (2 points)

17. Why is it important that haploid gametes be produced in animals? 

18. During which stage of meiosis do homologous chromosomes separate? (2 points)

APPLICATION QUESTION 

19. (Application) How might the information gained from this lab pertaining to mitosis and meiosis be useful to you, or how can you apply this knowledge to your everyday life as a non-scientist? The application will be graded according to the rubric below. (20 points)
 

16. What are haploid cells, and what are diploid cells? Provide an example of each cell type in the human body. (6 points)
17. Why is it important that haploid gametes be produced in animals? (5 points)
18. During which stage of meiosis do homologous chromosomes separate? (2 points)

APPLICATION QUESTION

19.  (Application) How might the information gained from this lab pertaining to mitosis and meiosis be useful to you, or how can you apply this knowledge to your everyday life as a non-scientist? The application will be graded according to the rubric below. (20 points)

13. Describe the differences between chromatin, chromosomes and sister chromatids. (3 points)
14. Refer to the images to identify cytokinesis either by the process of a cleavage furrow or cell plate. (3 points)

15. Which stage of meiosis is shown in the image below? (5 points)

16. What are haploid cells, and what are diploid cells? Provide an example of each cell type in the human body. (6 points)
17. Why is it important that haploid gametes be produced in animals? (5 points)
18. During which stage of meiosis do homologous chromosomes separate? (2 points)

12. What three components make up the structure of DNA? (3 points)

8. Refer to the images below, labeled A through E. Each image details a stage of the cell cycle for a cell undergoing mitosis. Place the images in correct order by placing the letters in the correct sequence, according to the stages of mitosis. (5 points)

7. Explain the differences that occur during cytokinesis in plants and in animal cells. (5 points)

a.  Explain the difference between mitosis and cytokinesis. (4 points)