The series of metabolic events that occurs within tomato plants in response to wounding is
A. a systemic response.
B. a pathogen-specific response.
C. resistance to coevolution.
D. the hypersensitive response.
E. a waterfall effect.
Answer: A
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Movement of charged molecules in an electrical field, which is used to separate nucleic acid fragments for recombinant DNA work, is called
A. electrophoresis. B. iontophoresis. C. plasmaphoresis. D. nucleophoresis.
Cilia are built of
A) microorganisms. B) microfilaments. C) micronutrients. D) microtubules.
Which of these is the best example of an umbrella species?
A. northern spotted owl B. giant panda C. cogongrass D. Burmese python E. American beaver
Which of the following is not involved in achieving and maintaining an erection?
A. nitrous oxide B. blood C. smooth muscle D. urethra E. cGMP