Symmetrical Versus Asymmetrical Arms Races
Arms races may be classified as either symmetrical or asymmetrical. In a symmetrical arms race, selection pressure acts on participants in the same direction. An example of this is trees growing taller as a result of competition for light, where the selective advantage for either species is increased height. An asymmetrical arms race involves contrasting selection pressures, such as the case of cheetahs and gazelles, where cheetahs evolve to be better at hunting and killing while gazelles evolve not to hunt and kill, but rather to evade capture.
Read more about this topic: Evolutionary Arms Race
Famous quotes containing the words symmetrical, arms and/or races:
“The symmetrical piles of white bodies,
the round white breast-shapes of the heaps,
the smell of the smoke, the dogs the wires the
rope the hunger. It had happened to others.
There was a word for us. I was: a Jew.”
—Sharon Olds (b. 1942)
“A well-regulated militia being necessary to the security of a free State, the right of the people to keep and bear arms shall not be infringed.”
—Second Amendment, U.S. Constitution (1791)
“Arrive at New Orleans, a city of ships, steamers, flatboats, rafts, mud, fog, filth, stench, and a mixture of races and tongues. Cholera, “some.” [At] Planters’ Hotel. Mem:—Never get caught in a cheap tavern in a strange city.”
—Rutherford Birchard Hayes (1822–1893)