Aging can sometimes lead to an increase in the stiffness at the base of the basilar membrane. What affect would this have on a person's hearing?
A. They would only be able to hear loud
sounds.
B. They would lose the ability to hear highpitched
sounds.
C. They would lose the ability to hear lowpitched
sounds.
D. They would not be able to distinguish the
amplitude of a sound.
B
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A procedure that places an oocyte and sperm in a culture dish, allows a few cell divisions, and then places the resulting very early embryo in the oocyte donor's uterus is
A) IVF. B) intrauterine insemination. C) surrogate insemination. D) GIFT.
During what stage of meiosis do chromosomes align on the spindle equator in homologous pairs?
The synthetic herbicide 2,4-D is actually a(n)
A) gibberellin. B) cytokinin. C) ethylene gas. D) auxin. E) florigen.
If a gallstone were to block the bile duct, which type of food would become more difficult to digest?
A) fat B) protein C) sugar D) starch