The fact that nearly everyone on the island of Sardinia has the same X chromosome sequence indicates that the population has experienced
A) mutation.
B) natural selection.
C) nonrandom mating.
D) gene flow.
C) nonrandom mating.
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A human X-linked recessive gene may be
a. found on the Y chromosome. b. passed to daughters from their fathers. c. passed to sons from their mothers. d. expressed more commonly among females. e. both passed to daughters from their fathers and passed to sons from their mothers.
The standard or housekeeping sigma factor used most often by E. coli RNA polymerase under normal growth conditions is called sigma ________.
A. 32 B. E C. 70 D. S
Which statement best compares aerobic and anaerobic respiration?
a) less atp is generated during anaerobic than during aerobic b) more water is generated during anaerobic than during aerobic c) more O2 is generated during anaerobic than during aerobic
When a blood vessel is damaged, platelets adhere to the damaged site and release chemicals, which attract additional platelets. Thus, platelet attraction is considered to be a ________ feedback mechanism
Fill in the blank(s) with correct word