The disease trichinosis is most commonly found in persons who
a. eat undercooked beef.
b. walk barefoot in a rice field.
c. eat undercooked pork.
d. are bitten by mosquitoes.
e. eat undercooked fish.
C
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What percentage of the world's tropical forests have been cut down for cropland, fuel wood, grazing
land and timber? a. 20% b. 30% c. 40% d. 50% e. 60%
Which neurons integrate information coming into and out of the central nervous system?
a. afferent neurons b. motor neurons c. interneurons d. efferent neurons e. sensory neurons
What are attached to the central carbon atom in an amino acid?
What will be an ideal response?
Liquid water has surface tension and a high specific heat, and it functions effectively as a solvent for polar covalent and ionically bonded molecules. What feature of water imparts these properties?
A) The hydrogen and oxygen that make up water form nonpolar covalent bonds. B) It readily dissociates to form H+and OH- ions. C) It has a high molecular weight. D) Water readily forms hydrogen bonds with other water molecules, and with polar solutes.