Abacteria does not have a nucleus inside its cell , that is why it is called a

Prokaryotic cell
this means its lacks some organelles such as a nuclues

Amoebae move by growing an extension of their bodies in the direction of movement and then flowing into it. this extension is called a  pseudopod  because when it's fully extended it resembles a limb, despite being only an extension of the amoeba's plasma membrane.