What is the correct path a smell sensation takes on its way to the brain?
a. mechanoreceptors ? olfactory bulb ? olfactory tract ? cerebrum
b. chemoreceptors ? olfactory bulb ? olfactory tract ? cerebrum
c. mechanoreceptors ? olfactory tract ? olfactory bulb ? cerebrum
d. chemoreceptors ? olfactory tract ? olfactory bulb ? cerebrum
e. chemoreceptors ? olfactory bulb ? olfactory tract ? cerebellum
ANSWER: b
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A virus's nucleocapsid is sometimes covered with a(n):
a. capsid. b. virion. c. organic material. d. envelope. e. membrane.
Which sentence best describes the relationship between gametophyte and sporophyte in the angiosperm life cycle?
a. Both gametophytes and sporophytes are totally independent from each other and are equally dominant. b. Sporophytes originate within and are dependent upon gametophytes. c. Gametophytes originate within and are dependent upon sporophytes.
Bacterial transposons often carry genes for which feature?
a. formation of flagella b. formation of antibiotic resistance c. formation of the sex pilus d. formation of a capsule
The disassociation of water molecules following irradiation is termed _____.
a) radiolysis b) ionization c) cross-linking d) point mutation