Today’s Objective SWBAT differentiate between prokaryotic and eukaryotic cells SWBAT give examples of prokaryotic and eukaryotic organisms Overview Video: http://www.youtube.com/watch?v=q3MUjQWnJ9Y

The Two Types of Cells As microscopes got more powerful, scientists started look at the parts inside cells. An organelle is a small, specialized structure inside a cell.

Eukaryotic Cells Prokaryotic Cells The Two Types of Cells All cells can be divided into two categories: Pro= before Prokaryotic cells came BEFORE eukaryotic cells Eukaryotic Cells Prokaryotic Cells

Prokaryotic cells (bacteria only)

All bacteria are always unicellular such as E. coli Prokaryotic Cells All bacteria are always unicellular such as E. coli Do NOT contain a nucleus or any other membrane-bound organelles. DNA floats around in the cytoplasm Pro= Before. Existed before the nucleus. Much smaller and simpler than eukaryotic cells.

Eukaryotic cells (every other organism)

Think: Why is this important???? Eukaryotic cells Eu- = TRUE. They have a true nucleus The nucleus contains DNA and therefore controls the cell. Found in all animals, plants, and fungi as well as unicellular algae and protozoans such as Amoeba. Contain membrane-bound organelles, which allow different parts of the cell to do different functions. Think: Why is this important????

Wow! Look at the difference! Eukaryotes Prokaryotes

Prokaryotes Both Eukaryotes Guided Practice – Venn Diagram Prokaryotes Both Eukaryotes Word Bank: Cytoplasm, DNA, Simple, Mostly multicellular, complex, no nucleus, ribosomes, bacteria, human cells, contains organelles, plants, Amoeba, always unicellular, plasma membrane, E. Coli, fungi, nucleus

Exit Ticket Although prokaryotic cells and eukaryotic cells have many different characteristics, which characteristic is the most important in identifying a cell as prokaryotic? The presence of a cell wall The small size of the cell Its existence as a unicellular organism The absence of a nucleus

Exit Ticket Which characteristic is NOT common to both prokaryotic cells and eukaryotic cells? Free-floating genetic material in the cytoplasm The presence of a cell membrane Cytoplasm within the cell membrane Its existence as a unicellular organism