Which of the following statements best defines an altruistic act?
A. Benefits another, related individual at some cost to the performer
B. Benefits another individual at some cost to the performer
C. Imposes a cost on the performer and another individual
D. Benefits the performer and another individual
E. Imposes a cost on the performer without benefiting another individual
Answer: B
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Why does mismatch repair not lead to mutation upon repair of heteroduplex DNA?
A. The incorrect base is recognized because it is methylated. B. The strand containing the misincorporated base is methylated. C. The strand containing the misincorporated base is not methylated. D. The strand containing the misincorporated base is phosphorylated. E. Actually, mismatch repair does lead to mutation about 50% of the time.
What defines a population in evolution?
A. Multiple species interacting together in an ecosystem B. Members of the same community C. Members of a single species that may, or may not, share a common space D. Interbreeding members of the same species that share a common space
A high hematocrit might indicate
A) anemia. B) too many white blood cells in circulation. C) inadequate red blood cell production. D) excessive production of platelets. E) polycythemia.
Who won the Nobel Prize for the discovery of the structure of DNA?
a) Sir Isaac Newton b) Charles Darwin c) Watson and Crick d) Gregor Mendel