Refer to the Figure

question 220

Multiple Choice

Refer to the figure. Which statement best describes the role of extensin in this signal transduction pathway?

• A) It is an elicitor.
• B) It strengthens the cell wall and blocks plasmodesmata.
• C) It is a constitutive defense.
• D) It attacks the pathogen directly.
• E) It serves as an alarm signal to cells that have not yet been attacked.

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