Category: Microbiology

There are different assignments listed, please keep the format so I know what belongs with what.

Explain in detail vertical gene transfer and provide an example.

Do some research on your favorite living animal (other than a cat or dog). Tell both the common name and the scientific name for the animal. Identify the home range of the animal. Explain why the animal is important to both humans and the ecosystem in which it is found. Your post must be a minimum of 75 words. Afterwards, you must respond to two (2) of your classmates discussion post. Your responses must be a minimum of 50 words and it must further the discussion of the animal the student wrote about. This assignment is worth a 50 points. A grade of zero will be assigned to any student who does not submit a post and respond to the post of two classmates. A grade of zero will be assigned in all cases of plagiarism, so use your own words in your post. This assignment is due prior to 10 pm on Friday, February 06, 2026.

1.Framing the Inclusion Argument (Intro + Definition of Life)

Goal: Set the lens and justify why inclusion is worth considering.

• Start with the purpose of biological classification:
• To represent evolutionary relationships, not just biological independence
• Acknowledge the core controversy:
• Viruses lack metabolism and depend on hosts
• Thesis:
• Viruses should be included in the tree of life if life is defined by evolutionary capacity rather than strict autonomy
• Briefly preview key evidence:
• Giant viruses
• Viral evolutionary arms races
• Open-ended evolution and gene exchange
• Signal relevance:
• Excluding viruses risks oversimplifying early evolutionary history and LUCA research

2.Giant Viruses, Virophages, and Viral Complexity

Goal: Use empirical evidence to challenge the simple parasite view.

• Introduce Acanthamoeba polyphaga mimivirus (APMV)
• Large genome size comparable to bacteria
• Genes involved in transcription, DNA repair, and translation
• Argue:
• These features blur the viruscell boundary
• Suggest viruses may have complex evolutionary origins
• Introduce virophages and MIMIVIRE
• Giant viruses can be infected and evolve defenses
• Key claim:
• These interactions demonstrate adaptation, selective pressure, and coevolution
• Conclusion:
• Viral complexity supports inclusion in evolutionary classification systems

3.Evolution, Autonomy, Polyphyly, and Horizontal Gene Transfer

Goal: Address the biggest theoretical objections head-on.

• Autonomy:
• Acknowledge viruses lack metabolism
• Introduce Ruiz-Mirazos open-ended evolution
• Argue autonomy exists on a continuum
• Polyphyly:
• Viral polyphyly complicates classification but does not invalidate it
• Many biological traits evolved multiple times
• Horizontal gene transfer:
• Viruses are major agents of gene exchange
• Shape host evolution and genetic innovation
• Key move:
• Viruses function as evolutionary actors, not passive byproducts

4. Implications for the Tree of Life (Conclusion for Inclusion Section)

Goal: Pull together your case and tee up synthesis.

• Summarize:
• Viruses evolve, adapt, and influence life across domains
• Clarify:
• Inclusion does not require redefining viruses as fully autonomous organisms
• Broader implication:
• The traditional tree model may need expansion toward network-based evolution
• Bridge to synthesis:
• Whether viruses belong on the tree depends less on what life is and more on how evolution is conceptualized

Scientists are concerned that bacteria will be resistant to all antibiotics within the next decade. Using your knowledge of genetics, describe how bacterial populations can develop drug resistance in such a short time frame. Explain why the following statement is false: Sexual reproduction is the only mechanism for genetic change. How can bacteriophages impact bacterial genetics? What extracellular appendages and mechanisms can bacteria use to introduce new genes to neighboring bacteria? Use references in APA format.

Guidelines:

• Your initial response should be at least 100-200 words in length, reflecting on the prompt above.

The book is attach for references

How does the possibility of being treated for a bacterial infection with a live bacteriophage (virus that targets only bacteria cells) strike you?

In your textbook, Krasners Microbial Challenge read

Chapter 8: “Viruses and Prions” and

Chapter 10: “Concepts of Microbial Disease”.

Discussion Postings:

Each student is required to post responses to three (3) discussion questions. The questions are in Modules #1, 3, & 6 and are to be posted in the discussion area of myLearning.

Before posting your responses, you need to research the topic on the internet using credible sources. Then you need to analyze the information (meaning you add your thoughts to the topic). Next, prepare a summary of the article (No cutting & pasting allowed). Then post your summary, no less than 100 words Long, making sure to include the APA-style reference you used. If you are citing directly (direct quotes) place the quotation marks around the text and add an intext citation. Please be aware that grammar and spelling count. Please limit the use of direct quotes. Quotes can support your answer, but they cannot be your answer.

After you have posted your response, you need to respond to another student’s posting. This response needs to be more than your agreement or disagreement with their posting. It should bring up alternative ideas that further the discussion of the topic. Please be aware that grammar and spelling count. No late discussion forum postings will be accepted.