Using Figure 8.9a,how long did it take for an intermediate level of virulence to arise?
A) Approximately 30 years
B) Between 1 to 4 years
C) It never evolved
D) Less than 1 year

Name: Using Figure 8.9a,how long did it take for an intermediate level of virulence to arise? A) Approximately 30 years B) Between 1 to 4 years C) It never evolved D) Less than 1 year
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Question

Using Figure 8.9a,how long did it take for an intermediate level of virulence to arise? 
A) Approximately 30 years 
B) Between 1 to 4 years 
C) It never evolved 
D) Less than 1 year

Quizplus · Accepted Answer

The intermediate level of virulence arises between years 1 and 4, as shown by the increase in the size of the red circle in the graph.