Deserts come in hot and cold varieties and have extreme temperatures. Plants and animals in deserts have adaptations to survive the harsh environment like storing water. Common desert plants include cacti and trees. Animals are nocturnal and get water from plants, with some burrowing underground for long periods. Examples given are saguaro cactus, barrel cactus, chain fruit cholla, thorny devil lizard, gila monster, armadillo lizard, and great jerboa.