Video: Arithmetic Logic Unit (ALU): Definition, Design & Function. An arithmetic logic unit (ALU) represents the fundamental building block of the central processing unit of a computer. An ALU is a digital circuit used to perform arithmetic and logic operations.
Snake Crawls up a Wall. 02.10.2008 - Many people ask me about the climbing capability of snakes. In particular, people want to know if snakes can get up into their attic. The answer is that yes, some species of snake are excellent climbers, and can climb walls.
Adaptation-mountain lion can climb up and down trees. The cougar can also jump up cliffs that are up to 18 ft. tall as well cover ground with incredible speed and grace. It has a distinctive call midway between a cough or a snarl. Despite its large size it is incapable of roaring.