When one male ram wins in a fight against another male ram, the winner has greater access to the female rams of the herd and is more likely to pass his genes on to the next generation. This phenomenon is called ______ .
a. natural selection
b. gene flow
c. genetic drift
d. sexual selection
d. sexual selection
When one male ram wins in a fight against another male ram, the winner has greater access to the female rams of the herd and is more likely to pass his genes on to the next generation. This phenomenon is called sexual selection. It would not be natural selection because the defeated male could still pass his genes on to another female if he were to win a future duel.
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The fourteen species of finch native to the Galapagos Islands
a. were victims of a mass extinction there b. evolved from a single common ancestor c. migrated in waves from South America d. evolved after a mass extinction of birds that previously lived in the islands e. were victims of a mass extinction there
The impact of natural selection is demonstrated by
a. directional selection. b. stabilizing selection. c. neutral selection. d. disruptive selection. e. directional selection, stabilizing selection, and disruptive selection.
The nucleus of a eukaryotic cell is characterized by
A) a double membrane. B) a triple-layer membrane. C) a nonporous membrane. D) a single-layered membrane.
Which technique does NOT involve PCR?
a. MDA b. metatranscriptomics c. T-RFLP d. SIP