1. The Characteristics of Life
Section 1-3 p
Characteristics of Life

2. Characteristics of Life
Living vs. Nonliving
Living = has ALL characteristics of life
Nonliving = may contain some, but not all life characteristics
Characteristics of Life

3. Characteristics of Life
1. Made of cells
Cell = smallest unit to sustain life
2. Respond to environment
Detect & react to a STIMULUS (a signal that causes a response)
Characteristics of Life

4. Characteristics of Life
3. Obtain & use energy
Metabolism = sum of all chemical processes (energy in & energy out)
4. Growth & Development
Cell division & enlargement allow growth
Characteristics of Life

5. Characteristics of Life
5. Reproduction
Produce offspring to ensure survival of species
6. Homeostasis
= maintain a stable, internal environment
Characteristics of Life

6. Characteristics of Life
7. Universal Genetic Code
Complex info. stored in DNA/RNA
8. Evolve/Change
Basic traits stay the same, but groups of organisms change over time
Characteristics of Life

8. Levels of Organization in Biology Chapter 1-3 Page 21
Characteristics of Life/Levels of Organization
Levels of Organization in Biology Chapter 1-3 Page 21
FROM SMALLEST TO LARGEST…
1. Atoms & Molecules: Subatomic particles (proton, neutron, electron) and groups of atoms.
Characteristics of Life/Levels of Organization

9. 2. Cells: Smallest functional unit of life.
3. Tissue: Groups of cells that perform the same function.
4. Organs: Groups of tissues that collectively perform the same function.

10. 5. Organ Systems: Groups of organs working together to perform the same function.
6. Organism: Individual living thing.