1. Cell Theory

2. Characteristics of Life
Organization
The ability to grow and develop
The ability to respond to the environment
The ability to reproduce

3. Theory
A theory is a widely accepted explanation of things observed in nature.
Theories are important because they serve as foundations for further research and study, and can lead to research that is beneficial to society.

4. Cell Theory Every living thing is made of cells.
The cell is the basic unit of structure and function of all living things.
Cells come only from other living cells by cell division.

5. Cell Structures and Functions

6. 2 Types of Cells: Prokaryotic Eukaryotic Has a nucleus No nucleus
Organelles have no membranes
Very small
Eukaryotic
Has a nucleus
Organelles have membranes
Much larger

7. Prokaryote Eukaryote

8. Two Types of Prokaryotic Cells
Eubacteria:
Common bacteria
Smallest Cells
No nucleus, but do have DNA
Archebacteria:
Similar to bacteria, but can live in places no other organisms can live (such as high salt or high heat environments