lect_quiz3 - The pathogen disease progress curve will...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Name_________ PP 315 – Lecture Quiz #3 1. Define complete resistance? How does the use of complete resistance change the pathogen population? (2pts) BONUS: HOW? (1pt) Complete resistance is the ability of a host to prevent infection by a pathogen. Complete resistance reduces the pathogen population by preventing the pathogen from establishing on a host and allowing it to reproduce. 2. Define aggressiveness? What type of host resistance results in shifts in pathogen aggressiveness? (2pts) BONUS: HOW? (1pt) Aggressiveness is how fast a pathogen can infect a host and then reproduce to spread. Complete resistance decreases aggressiveness by preventing reproduction of the pathogen. 3. What is the gene-for-gene hypothesis? Draw a quadratic check to illustrate this interaction. (2 pts) For each resistance present in a host there is an avirulence in a pathogen.
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The pathogen disease progress curve will increase and then decrease forming a zigzag pattern. 4. What is a disease gradient? How is it different from a Disease Progress curve? (2 pts) A disease gradient shows the spread of disease in an area. A disease progress curve is shows the intensity of a disease. 5. What is an agroecosystem? List 3 characteristics of agroecosystems that make them more favorable for disease development than natural ecosystems. (2pts) An agroecosystem is an independent community that has very little change because of management practices by humans. Natural predators are eliminated, hosts do not build resistance because they are constantly replaced, there are more host plants that are the same and are densely packed in a small area....
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern