Cells

Prokaryotic cells are cells than have no nucleus, in fact the word Prokaryotic means " before the nucleus" so really all they are are very simple organisms with little more than a cell membrane and circular DNA strands. Eukaryotic cells on the other hand are very complex cells with a nucleus among many other organelles. Their DNA is even more complex covered with proteins call histones.
Plant and Animal cells are similar in many aspects but the three major differences are that plant cells can create their own food with the use of their chloroplasts which animal cells do not have. Another important difference is that plant cells have a cell wall animal cells do not, and another very important differences is the vacuole. In plant cells there is a giant vacuole the accounts for 90% of the cells volume, where as in animal cells there are usuall one or more much smaller vacuoles.