Parts of Cells and Cell Theory

A cell lacking a nucleus or any other

membrane-enclosed organelle

A cell with a nucleus and membrane-bound

organelles

Microorganisms important as decomposers;

widely distributed and can break down just about

any type of organic matter

A highly diverse group of single-celled,

prokaryotic organisms

An organism made up of one cell

An organism made up of more than

one cell; often contains different cells

A tough, protective barrier that surrounds the

outer membrane of some types of cells

A membrane-bound structure inside a cell that

performs a specialized function

The thin tissue that forms the outer surface of

the cytoplasm of a cell and regulates the

passage of materials into and out of the cell

Hair-like structures on the outside of cells that

produce movement