Why has cystic fibrosis persisted at such a high
percentage in some populations?
a. affected individuals reproduce before the
disease is fatal
b. there is an advantage to being a carrier
c. recessives have a higher fitness than
dominants
d. it is an easily treated disease
e. the symptoms disappear in early adulthood
B
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Candida is another name for
a. baker’s yeast. b. brewer’s yeast. c. slime molds. d. yeast that can cause vaginal infections
The arrows in the diagram below are pointing to the ____
a. esophagus and small intestine b. trachea and large intestine c. sphincters at the top and bottom of the stomach d. esophagus and pancreas e. stomach
Which of the following carries amino acids to ribosomes, where amino acids are linked into the
primary structure of a polypeptide? a. mRNA b. tRNA c. hnRNA d. rRNA e. rDNA
Which is NOT a function of the kidneys?
A. regulating blood pressure by regulating salt balance in the blood B. production of water from oxygen and bicarbonate ions (HCO3) C. elimination of nitrogenous wastes including urea, uric acid, and creatinine D. hormone secretion to stimulate red blood cell production and regulate sodium ion levels E. monitoring and maintaining blood pH