Not only does its name anticipate the American document of a century later, the English Bill of Rights anticipates some of the American billâs specific provisionsâfor example, the Eighth Amendmentâs ban on excessive bail and fines and on cruel and unusual punishment.
If the leaf contains carotene, as do the leaves of birch and hickory, it will change from green to bright yellow as the chlorophyll disappears. In some trees, as the concentration of sugar in the leaf increases, the sugar reacts to form anthocyanins. These pigments cause the yellowing leaves to turn red.
Although not fully understood, several factors affect when and how leaves change color and the hues they produce. These factors include: 1  Shortening of day length. 2  Cooling temperatures. 3  organic pigments in the leaf cells. 4  sunlight intensity. 5  moisture. 6  tree genetic traits. 7  site characteristics. 8  latitude.