Prokaryotic and Eukaryotic Cells TSW – Recognize that the presence of a nucleus determines whether a cell is prokaryotic or eukaryotic. 6.12B

Cells There are two basic types of cells 1.Prokaryotes or prokaryotic cells 2.Eukaryotes or eukaryotic cells

Prokaryotes do not have a nucleus The genetic material is bunched together, but is not found inside a nucleus Think PRO and NO (no nucleus) Prokaryotic cells

Prokaryotes Prokaryotes are single celled organisms that sometimes live in colonies or groups They are ancient life forms that have been around for billions of years They are less developed with only a few cell parts that can be identified under a microscope However, they are able to survive a variety of conditions and live quite well on Earth. Bacteria are prokaryotes

Prokaryotic Cell Genetic material is not found inside a nucleus.

Eukaryotes Eukaryotes are more complex cells than prokaryotes They have a nucleus which contains the genetic material of the cell They also have more identifiable cell parts Think “Eu” pronounced “you” You are made up of complex eukaryotic cells.

Eukaryotes Most living things we are familiar with are eukaryotic. This includes: all plants, all animals, all fungi

Eukaryotic Cell Nucleus that contains the genetic material of the cell. Notice this cell has more cell parts and is much more complex.

Comparing cells Notice the difference in size between the two cells.

Cell size

Summary Prokaryotes No nucleus Smaller in size Less complex Single celled organisms Ancient life form Bacteria is an example Eukaryotes Has a nucleus Larger than prokaryotes More complex Can be single celled organism but all multi- celled organisms are eukaryotes Plants, animals, fungi – all are eukaryotic

References otic_cells.html otic_cells.html ER/ProkEuk.htm ER/ProkEuk.htm prokaryotic_and_eukaryotic_cells prokaryotic_and_eukaryotic_cells