Which of the following hormones increases when plants are flooded?
A. cytokinin
B. auxin
C. ethylene
D. gibberellin
E. abscisic acid
Answer: C
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Both Staphylococcus aureus and Streptococcus pyogenes
A. are rod-shaped. B. have fibronectin binding proteins. C. cause necrotizing fasciitis. D. have exotoxin A.
Which event occurs in the lungs?
a. Free H+ binds to hemoglobin. b. Plasma HCO3? enters erythrocytes.
c. CO2 and H2O are converted into HCO3? and H+ in the plasma. d. Carbonic anhydrase converts CO2 and H2O into HCO3? and H+ in erythrocytes. e. CO2 binds to hemoglobin.
Which of the following is an example of macroevolution?
A. the origin of horses and donkeys from a common ancestor B. giraffes with longer necks reaching higher tree branches C. antibiotic resistance in S. aureus D. female cardinals preferring males with bright red feathers E. the beaks of cactus finches changing in size in response to a drought on the Galapagos islands
Enzymes that are secreted by a cell to catalyze hydrolysis reactions are
A. apoenzymes. B. regulated enzymes. C. constitutive enzymes. D. endoenzymes. E. exoenzymes.