is the portion of the brain ensures that skeletal muscle contraction follows the correct pattern leading to smooth

Cerebellum

Explanation:

The cerebellum is the portion of the brain that is responsible for smooth, coordinated voluntary movements. The skeletal muscle is voluntary because one can voluntarily choose to control this particular type of muscle as compared with cardiac muscle. It can be divided into three lobes which are the anterior, posterior, and flocculonodular lobes.

this is math not biology xd

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.