Which of the following has a “no cyst” stage?
a. Giardia lamblia
b. Entamoeba histolytica
c. Trichomonas vaginalis
d. None of these
Answer: c. Trichomonas vaginalis
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A pyrimidine is double-ring molecule
__________________Indicate whether the statement is true or false.
To what does RNA polymerase bind to begin the process of transcription?
A) promoter B) structural gene C) codon D) anticodon
During __________ between predator and prey species, the predatory species becomes more efficient
at catching prey, while the prey species becomes better at escaping predators. a. character displacement b. coevolution c. Batesian mimicry d. competitive exclusion e. succession
Which of the following would increase the electrochemical gradient across a membrane?
A) a sucrose-proton cotransporter B) a proton pump C) a potassium channel D) both a proton pump and a potassium channel