A Patient Comes to See You Complaining of a Spider

question 6

Multiple Choice

A patient comes to see you complaining of a spider bite. He shows you a sore on his wrist—the area around it is red and swollen, and the lesion is leaking pus. The patient tells you he found a spider in his car, which is why he thinks this is a bite. He also tells you that he has been taking penicillin tablets that his wife had left over after being prescribed the drug a few months previously for pneumonia. Even though he has taken the tablets for four days, the lesion is not healing and that he is really feeling terrible, with pain, fever, and chills. You suspect that your patient has a wound infection, so you sample the pus and send it to the lab for analysis.
-Further tests indicate that your patient has a methicillin-resistant Staphylococcus aureus (MRSA) infection. You explain to the patient that these bacteria are not impacted by penicillin or the related drug methicillin. This resistance is thought to have arisen originally by a random change in the cell's chromosome through a process called 

• A) spontaneous mutation.
• B) antigenic variation.
• C) quorum sensing.
• D) vertical gene transfer.
• E) indirect selection.

Recognize the role of ecological models (e.g., lottery models) in understanding community dynamics.

Understand the processes involved in colonization and succession on new land forms such as volcanic islands.

Understand the components and structure of ecological communities, including trophic levels and interactions among species.

Recognize the importance of species diversity in ecosystem stability and function.

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Definitions:

Northern Europe

A geographic and cultural region in Europe, typically referring to the northern territories including countries such as Norway, Denmark, Sweden, Finland, and Iceland.

Africa

The world's second-largest and second-most populous continent, known for its vast cultural, ecological, and geopolitical diversity.

Average American Worker

Refers to the typical employee in the United States, often used in discussions about labor markets, income levels, and working conditions.

Hours On The Job

The amount of time that employees spend working during a given period, often used to measure labor productivity and working conditions.