Plant Diseases Quiz

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Questions and Answers

Which of the following best defines a plant disease?

  • A condition that makes a plant less productive
  • A condition caused by an external agent
  • A condition that affects the normal physiology of a plant (correct)
  • A condition that affects the appearance of a plant

What is the main consequence of a plant disease?

  • Decreased plant productivity (correct)
  • Decreased plant size
  • Decreased plant health
  • Decreased plant variety

What distinguishes a plant disease from a normal healthy plant?

  • Appearance (correct)
  • Health
  • Variety
  • Size

Which of the following is true about the relationship between resistance genes and virulence genes?

<p>Resistance genes in the host correspond to virulence genes in the pathogen (B)</p> Signup and view all the answers

Which of the following is required for a pathogen to infect a variety with resistance gene a?

<p>The pathogen must have virulence gene a (C)</p> Signup and view all the answers

Which of the following is true about diseases with resistance involving multiple genes?

<p>The pathogen must have multiple corresponding virulence genes (D)</p> Signup and view all the answers

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