1. Essential Standard Bio.1.2 Analyze the cell as a living system
Biology
Essential Standard
Bio.1.2 Analyze the cell as a living system

2. Biology Organism - living thing Biology - study of all living things
Structure and function of cells
Interactions between species
History of individual organisms

3. Characteristics of Life
Characteristics of Life = all organisms share certain features characteristic of all living things
6 characteristics!

4. 1. Contains Cells Cell - basic unit of life
Unicellular organisms - composed of one cell (identical copies)
Multicellular organisms – composed of more than one cell through differentiation
Differentiation – process where cells become different for different tasks
Skin Cells
Bacteria

5. 2. Shows Levels of Organization
Living things are organized at molecular and cellular levels
Simple to Complex
In Organisms:
Atom  Molecule  Organelle  Cell  Tissue  Organ  Organ system Organism
In Ecosystem:
Organism Population  Community  Ecosystem  Biosphere

6. 3. Energy Use Living things use energy (metabolism)
Energy used for maintenance, growth, and reproduction
Autotrophs = make own energy through photosynthesis
Heterotrophs = consumes energy

7. 4. Maintains Homeostasis
Homeostasis - maintaining stable internal conditions
Internal conditions (e.g. food, water, and temperature) are controlled within the organism

8. 5. Growth
All living things grow as a result of cell division and cell enlargement
Organism development is produced by repeated cell divisions and cell differentiation

9. 6. Reproduces Reproduction – organisms produce new organisms
DNA is passed to offspring
Gene – short segment of DNA containing a single trait
Asexual Reproduction – identical copy of parent cell
Sexual Reproduction – combination of gametes (sperm + egg)

10. Populations Evolve
Populations of organisms evolve in response to environmental factors
Natural Selection – organisms with favorable traits reproduce