Whooping cough is frequently observed in
A) elderly residents of nursing homes.
B) individuals with compromised immunity.
C) children under 6 months of age.
D) health care providers.
Answer: C
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Members of the phyla Ectoprocta, Brachiopoda, and Phoronida all possess a lophophore, which isa(n) ____
a. cluster of pores along the aboral surface, used for expelling wastes from the digestive tract b. hard shell made of calcium carbonate c. outpocket of the digestive tract, where metabolic wastes are processed before emptying into the digestive tract for expulsion d. circular fold with one or two rows of hollow, ciliated tentacles e. extra body cavity surrounding the digestive tract filled with muscles used for locomotion
Monosaccharides have a carbon to hydrogen to oxygen ratio of
a. 1:1:1. b. 1:1:2. c. 2:1:1. d. 1:2:1. e. 1:2:2
The feathers of Sinosauropteryx prima are
hypothesized to have served for
a. flight. b. insulation. c. scaring predators. d. camouflage. e. sexual attraction
The basal body is comprised of which structural component(s) of flagella?
a. Rod b. Filament c. Rod and Rings d. Rings e. Rod and Hook f. Hook