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Sexually transmitted diseases are spread pick one a

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Question 7 of 14 4.0 Points Sexually transmitted diseases are spread: (Pick ONE). A. Only by sexual intercourse B. Most effectively by sexual contact, though they may be able to spread in other ways C. By many kinds of fluid-fluid contact (blood transfusions, needle sharing, etc) D. None of the above Reset Selection Mark for Review What's This? Question 8 of 14 4.0 Points How would you modify this equation: dI/dt = " SI – ! I – dI – vI to account for a disease that was transmitted vertically (from parent to offspring at birth) as well as by contact between infected and susceptible individuals? (Pick ONE). Reset Selection Mark for Review What's This? Question 9 of 14 4.0 Points Which of the following enhances the spread of an infectious disease (dependent on casual contact)? (Pick ONE). A. A large interacting population of hosts
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5/1/13 10:44 AM 2013 Problem Set 5 Ecology Lectures 13-15 Page 4 of 6 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment B. A high transmissibility of the disease C. A long duration of the disease D. All of the above Reset Selection Mark for Review What's This? Question 10 of 14 4.0 Points Over time, diseases can become less virulent (less damaging, less often fatal) to their hosts because: (Pick ONE). Reset Selection Mark for Review What's This?
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