Cell Theory

1
Cell Theory

• Developed in 1665 by Robert Hooke
• Three main ideas
• All organisms are composed of one or more cells
• The cell is the basic unit of organization
• All cells come from preexisting cells

2
Two basic cell types

• Prokaryotic
• Prokaryotes lack a nucleus and membrane bound
  organelles

• Eukaryotic
• Eukaryotes have a nucleus and membrane bound
  organelles

3
Homework

• Pg. 211 1-20, 21, 23
• Worth 22 pts.