In this instance, nature is said to have “selected” the camouflaged butterfly over other variations that weren’t as well hidden. In “artificial selection,” the same thing happens, only we human beings make the choices.
Back when most folks relied on an icebox to cool food, a block of ice was a precious commodity.If you put hot food in the icebox the ice might melt, and by the time the ice truck came through the neighborhood again all your food may have spoiled.
Fans of classic movies will remember the famous dueling banjos scene in Deliverance, the story of four city friends who take an ill-fated boating trip down a backwoods Georgia river. As the friends set out, one of the friends challenges a local boy with a banjo to see who can play faster. At the end [...]