What characteristic of a water molecule accounts for its polarity?
A. its cohesiveness
B. its ability to act as a solvent
C. its unequal sharing of electrons
D. the hydrogen bonding to neighbouring water molecules
Ans: C. its unequal sharing of electrons
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Growth poles
A) work as part of government policies to encourage cumulative causation. B) emerge through the forces of supply and demand. C) succeed based on the concept of comparative advantage. D) rely on the international division of labor. E) are a consequence of core-periphery relations.
A mouse gene was identified and determined to be required for formation of heart muscle. A gene with a similar sequence was identified in the human genome. What experiment could scientists do to determine if the mouse and human genes have similar functions?
A) The scientist could search the human genome for genes that encode proteins that are identical to the protein encoded by the mouse gene. B) The scientist could place the normal human gene into normal mice and see if the resulting mice are viable. C) The scientist could place the normal human gene into mutant mice to see if heart muscle forms in the mouse. D) The scientist could place the mutant mouse gene into humans to see if humans develop without heart muscle.
What evolutionary role is served by the redundancy of the genetic code? What will be an ideal response?
Among the virulence factors produced by Staphylococcus aureus are hemolysin, coagulase, hyaluronidase, and enterotoxin. Which of these factors contribute to the ability of S. aureus to invade the body?
A) coagulase B) enterotoxin C) hemolysin D) hyaluronidase E) coagulase and hemolysin