Theory and Types

Cell Theory

1. All living things are composed of cells.

2. Cells are the basic unit of life.

3. Cells are produced by other cells.

Prokaryiotic vs Eukaryitoic


Also known as "prokaryotes". There is only one thing that is a prokaryotic cell, bacteria. A prokaryotic cell doesn't have a membrane bound nucleus. Prokaryotes also don't have DNA. Some characteristics of a prokaryotic cell are...

- they are smaller

- less evolved

- older (found in prehistoric times! Before any form of a eukaryotic cell has been found)

- less complex (lack membrane bound organelles)


Also known as "eukaryotes". Eukaryotes are everything living other than bacteria (plants, animals, fungi, Protista). These life forms have a nucleus and DNA inside of the the nucleus. Some characteristics of a eukaryotic cell are...

- they are complex (a lot of organelles)

- larger

-more evolved


Plants are quite different from plants, not just physical features. Some differences include...

-a cell wall

-a chloroplast

-a large central vacuole used for structure and support(a vacuole is full of water)



While animals don't have as many organelles as the plant has, the animal cell does have a vacuole, but it is used for storage. One thing that the animal dells do have that the plant cell does not, are centrioles. Centrioles help in cell division.