Viruses come in several shapes. All of the following are shapes of viruses EXCEPT:
A. head and tail.
B. triangular.
C. icosahedral.
D. helical.
E. spiral.
B
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The column of water extending in tubes from
plant roots to leaves is maintained by a. cohesion among water molecules. b. ionic bonds. c. covalent bonds. d. hydrophobic interactions. e. hydrophilic interactions.
About _____ of lung cancers occur in smokers.
A. 20 percent B. 40 percent C. 60 percent D. 80 percent E. 1000 percent
After eating a Yummie cake, which of the following metabolic processes is likely occurring at the fastest rate?
A) hydrolysis of glycogen B) dehydration reactions involving glucose C) dehydration reactions involving fatty acids D) hydrolysis of cellulose
Which of the following is true of the genetic cross shown in the figure?
daughters will be carriers. b. Their sons have a 50 percent chance of being carriers. c. Their sons have a 50 percent chance of having the disorder. d. Their daughters have a 50 percent chance of having the disorder.