User: Many animals have body symmetry with distinct front and back ends. This type of symmetry is A. unilateral symmetry.
Cumulonimbus, from the Latin cumulus (heap) and nimbus (rainstorm, storm cloud), is a dense towering vertical cloud associated with thunderstorms and atmospheric instability, forming from water vapor carried by powerful upward air currents.
Cumulonimbus Clouds (thunderclouds). Cumulonimbus is a type of cloud that is tall, dense, and usually dark. These clouds form thunderstorms, and can create severe weather conditions, such as heavy rain, damaging winds, hail, lightning, and tornadoes. A cumulonimbus cloud that progresses to an intense, long-lived form is known as a supercell.