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EXAM 2 F07 DE - Copy

EXAM 2 F07 DE - Copy - Name PP 315 Hour Exam 2 This is a...

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1        Name ___________ PP 315 Hour Exam 2  October 18, 2007 This is a closed book exam. You have 75 minutes to complete it. Be sure to carefully answer all parts of each question. 1. Multiple choice.  Highlight,  bold  or otherwise identify the one correct answer for each. (7 pts) 1. Plant defense mechanisms include  a) avoidance   b) escape  c) tolerance  d) oxidative bursts e) all of the above f ) a and c only  2. Characteristics of Systemic Acquired Resistance (SAR) include  a) systemic protection that requires a period of time to develop but is typically long lasting  b) it is induced by pathogens that cause necrosis  c) protection is not passed on to seed progeny   d) protection is non-specific and may have effects on many pathogens e) all of the above 3. Which of the following  is not  an example of a preformed resistance mechanism?  4. Preformed chemical resistance may reduce, delay, or prevent disease by a) determining the host range of organisms b) initiating phytoalexin production  c) inducing systemic resistance in Solanaceous plants d) conferring latency to certain pathogens in some tissues e) a and d only   5. Cork layers stop or slow disease by  6. The southern corn leaf blight epidemic was important because 
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