Unit 5

Which pair correctly matches a vector and the infectious disease it carries? 

• human – influenza
  
• opossum – rabies
  
• mosquito – malaria
• flea – Lyme disease
  

Which best explains how a nonliving virus is able to reproduce?

• A virus becomes living when in contact with a host organism.
• A virus infects a host organism by injecting its DNA into the cells of the host organism.
• A virus infects a host organism by pulling the DNA from the cells of the host organism into itself. 
•  A virus becomes living when a sufficient number of viruses invade a host organism and cause an infection.

Which disease can be transmitted by casual contact between two individuals?

• influenza
• malaria
• kidney disease
• Lyme disease

Which practice contributes to the antibiotic resistance of bacteria?

• failing to cover open cuts
• taking only part of a prescribed antibiotic
• completing an entire antibiotic prescription
• storing medicine and antibiotic products improperly
  

Why do some antibiotics become ineffective over time?

• because they only kill certain viruses
• because they mutate before being used
• because they are overused for treatments
• because they only work for a few hours a day
  

Why do doctors suggest that people get a flu vaccine each year?

• Viruses replicate more rapidly over time.
• Viruses can mutate from year to year.
  
• Vaccines are absorbed by the body after a year.
  
• Vaccines get stronger over time.
  

A student sorted a list of diseases and conditions into two groups.

• inherited conditions.
• infectious diseases.
• caused by environmental conditions.
• not treatable with medications.
  

Alan noticed that his foot itched between his toes after coming home from the gym. He now believes he may have contracted athlete’s foot. What type of pathogen most likely caused this possible infection of his foot?

• bacterium
• fungus
• virus

A city has an outbreak of a disease that affects an unusually large portion of its population at the same time. Which term best describes the outbreak?

• pandemic
• plague
• epidemic
• infection

Which aspect of modern life could most likely cause an epidemic to turn into a pandemic?

• vaccination
• transportation
• communication
• sanitation