What is host plant resistance?
A. Producing large quantities of seeds in some years.
B. The ability to prevent herbivory through various defenses.
C. A form of crypsis practiced by tropical rain forest plants.
D. The secretion of chemicals that are toxic to competing plant species.
E. The ability of plants to grow taller than their competitors.
B. The ability to prevent herbivory through various defenses.
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An example of an enzyme with high activity in an acidic environment is _____
A) amylase B) pepsin C) gastrin D) trypsin E) sucrose
Researchers began using short tandem repeats (STRs) because
A) shorter DNA molecules were more likely to persist in a violent situation. B) each person has no more than one copy of each STR. C) STRs are nonuniformly distributed. D) restrictive enzymes cannot be used to cut short DNA molecules.
Stacey is 5 foot 8 inches tall and weighs approximately 80 pounds, yet she thinks she is very fat. Which of the following statements is probably not true about Stacey?
Select one: a. Stacey most likely suffers from anorexia nervosa. b. Stacey is actually starving. c. Stacey has probably stopped menstruating. d. Stacey is in danger of dying. e. Stacey probably binge-eats and then forces herself to throw up.
Helicase
A. supercoils DNA. B. unwinds DNA. C. unwinds RNA. D. winds RNA.