Members of the ____ subphylum, including the centipedes and millipedes, have two body regions: a head with one
pair of antennae and a segmented trunk with one or two pairs of legs per segment.
a. Myriapoda
b. Trilobita
c. Chelicerata
d. Hexapoda
e. Crustacea
ANSWER: a
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Some of the olfactory receptor (OR) genes in humans
A. have been inactivated, reducing our olfactory capabilities compared to other primates. B. have been activated, enhancing our olfactory sense compared to other primates. C. have duplicated more frequently, resulting in increased paralogs compared to other primates. D. have been conserved more rigidly, resulting in increased orthologs compared to other primates.
Plant tissues are more than 90 percent ____ by weight
a. carbohydrates b. water c. carbon d. nitrogen e. cellulose
Leaf abscission is initiated and orchestrated by changing levels of the plant hormone __________
a. ethylene b. cytokinin c. auxin d. abscisic acid e. gibberellin
Choose the correct pathway of information flow in the cell
A) DNA ? RNA ? protein B) ER ? DNA ? RNA ? protein C) ER ? DNA ? Golgi ? protein D) RNA ? DNA ? protein