Some things consist of only one cell. They are called unicellular organisms. One of the simplest living things, an amoeba, is made of only one cell. Amoebas (sometimes spelled amebas or amoebae) are too small to be seen without a microscope, but they are commonly found in ponds and lakes
The cell nucleus acts like the brain of the cell. It helps control eating, movement, and reproduction. It contains the genetic material and controls the function of the cell.
