They are complex and larger than the prokaryotic cells its name is drived from a Greek word meaning 'good' or 'true nuclei' they consist of the cell wall which protects and supports the plasma membrane these cells are found in all organisms except bacteria and blue green algae for example plant animal fungi etc all are eukaryotes. Amoeba is a eukaryote because it has a distinct nucleus which is bound by nuclear membrane.
Additional information :-
Cell :- Smallest structural and functional unit of a living organisms.
Unicellular organisms :- The organisms made up of one cell only.
Multicellular organisms :- The organisms made up of two or more cells.
Cell wall :- The covering of cellulose outside plasma membrane also called plasma membrane.
Centriole :- The cell organelle that helps in cell division found only in animal cell.
Chloroplast :- The photosynthetic originals found in a plant cell green in colour due to the presence of chlorophyll.
Tissue :- A group of cells having the same structure performing the same function.
Nucleus :- The control centre of the cell