Which of the following actions by Florence Nightingale demonstrates her role as an epidemiologist?
a. She convinced other women to join her in giving nursing care to all the soldiers.
b. She demonstrated that a safer environment resulted in decreased mortality rate.
c. She obtained safe water and better food supplies and fought the lice and rats.
d. She met with each soldier each evening to say goodnight, thereby giving psychological support.
Question 2
Between 2000 and 2005, 1000 of 10,000 young women ages 17 to 20 years at a university tested positive for a sexually transmitted infection (STI).
Of the 1000 diagnosed STIs, 300 were gonorrhea and 500 were chlamydia. Which of the following statements best summarizes these findings?
a. The proportion of cases of gonorrhea to all STIs was 300:1300.
b. The proportion of cases of gonorrhea to chlamydia was 300:500.
c. The proportion of cases of gonorrhea to all STIs was 50.
d. The proportion of STIs to the total population was 100:1000.
Step 2 of gene cloning: The actions of a restriction enzyme and DNA ligase to produce a recombinant
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