When you get your ZZZs, you cycle between REM and non-REM sleep. REM stands for rapid eye movement. During REM sleep, your eyes move quickly in different directions. That doesn't happen during non-REM sleep. First comes non-REM sleep, followed by a shorter period of REM sleep, and then the cycle starts over again.
Classes of Wheat. The many types of wheat grown throughout the world have common names such as durum, poulard, einkhorn or emmer. In the United States, there are generally six classes of wheat grown: hard red winter, hard red spring, durum, soft red winter, hard white and soft white.
Wheat is a grain crop with some 25,000 different cultivars in the world today: most of these forms are varieties of two groups: common wheat and durum wheat.