Explain the hypersensitive response

What will be an ideal response?


When a plant becomes infected by bacteria or fungi it may be able to defend against the attack by
surrounding the infected cells with dead cells. The process begins when a highly reactive oxygencontaining
compound breaks down nucleic acids, inactivate enzymes, or compounds that have other
toxic effects on cells. This initiates the killing of cells.

Biology & Microbiology

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A vein is a blood vessel that always carries

(a) blood toward the heart. (b) blood away from the heart. (c) oxygen-rich blood. (d) oxygen-poor blood.

Biology & Microbiology

The increased mortality of coniferous trees in the Pacific Northwest between 1955 and 2007 is an example of a

reaction to ____.

a. density-independent factors b. density-dependent factors c. predation d. crowding e. population growth

Biology & Microbiology

The panting responses that are observed in overheated birds and mammals dissipate excess heat by _____

A) countercurrent exchange B) acclimation C) vasoconstriction D) evaporation

Biology & Microbiology

Which color pigment is produced by Pseudomonas aeruginosa

A. lemon yellow B. red-orange C. golden D. blue-green E. pale orange

Biology & Microbiology