The transduction pathway that activates systemic acquired resistance in plants is initially signaled by _____
A) antisense RNA
B) Pfr phytochrome
C) salicylic acid
D) abscisic acid
E) red, but not far-red, light
Answer: C
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In addition to burning fossil fuels, humans return CO2 to the atmosphere faster than it can be removed by:
A. clearing forests for agriculture. B. polluting the oceans. C. generating nutrient pollution. D. expanding rice production. E. expanding beef production.
What structural component in skeletal and cardiac muscle conducts action potentials from the outer surface of the muscle fiber inside to the myofibrils?
A. actin B. tropomyosin C. troponin D. transverse tubule E. None of these.
A fossil is defined as any evidence of an organism from
A. at least 500 years ago. B. at least 1000 years ago. C. at least 25,000 years ago. D. at least 10,000 years ago. E. at least 100,000 years ago.
A bobcat is feeding on a white-tailed deer. It first eats the liver, which is rich in stored sugars. In what form would sugar be stored in the deer's liver?
A. glycogen B. amylose C. glucose D. maltose E. cellulose