1. Cell Division & Prokaryotes

2. Why do cells divide? Growth Replace damaged or old cells
Produce new individuals in single celled organisms
Differs in prokaryotes (bacteria) and eukaryotes

3. Identical Daughter Cells
Two identical daughter cells
Parent Cell

4. Surface Area to Volume Ratio
The area covered by the cell membrane
Volume:
Space inside of the cell (cytoplasm)
Length of a side
Surface Area
Volume
Ratio 1 6 2 24 8 3 4 96 64
1.5

5. Surface Area : Volume

6. Having More Surface Area (lines) than Volume (squares) is Better!

7. BIGGER CELLS NEED MORE FOOD
and OXYGEN, but CAN’T TRANSPORT
IT FAST ENOUGH or IN BIG
ENOUGH QUANTITIES!

8. Cell Division in Prokaryotes

9. Prokaryotic Chromosome
The DNA of prokaryotes (bacteria) is one, circular strand of DNA attached to the inside of the cell membrane

10. Cell Division in Prokaryotes
Prokaryotes like bacteria divide into 2 identical cells by the process of binary fission
Single chromosome makes a copy of itself
Cell membrane forms between the chromosomes dividing the cell
Parent cell
Chromosome replicates
Cell splits
2 identical daughter cells

11. Animation of Binary Fission

12. Prokaryotic Cell Undergoing Binary Fission

13. Click HERE to watch short video of binary fission