Introduction to Biology

Bio-= Life-logy- Study of

Biology- Study of Life

Types of Life

5 Characteristics of Life

1. Cells- most basic unit of life.(Organization)

Ex. Animal, Plant, Bacteria

2. EnergyAnimals

•Eat Food•Cell Respiration

PlantsCollect SunlightPhotosynthesis

3. Respond to Environment

• React to external stimuli

• Example: Birds Migrate, Shivering in Cold

Homeostasis

• Maintenance of a stable internal environment. – Temperature– Heart Rate– Breathing

4. Grow and Develop• Start at a small size and

grow larger and develops in order to survive. Changes over time.

• Example-1. Baby -> Adult2. Seed -> Plant

5. Reproduction- create new living organisms

Asexual •1 parent/ 2 identical offspring

Sexual•2 parents/ 1 genetic different offspring•Combination of sperm & egg

5 Characteristics of Life1. Cells

2. Energy

3. Respond to Environment

4. Grow and Develop

5. Reproduce

THESE ARE NOT CHARACTRISTICS OF ALL LIFE

-MOVING

-BREATHING

-EATING

-DANCING

Levels of BiologyMicro- = small•Biochemistry- atoms, bonds, molecules •Cell Biology-parts & function of cell•Genetics- heredity

Macro- = Large•Evolutionary theory•Ecology- organisms relating to one another•Botany- study of plants•Zoology- study of animals

Fields of Biology• Anatomy - The study of body parts and their

locations (ana = up, tom = to cut)• Physiology - The study of how various body parts

function (physio = nature)

• Botany - The study of plants (botan = grass, pasture)

• Cytology - The study of cells (cyto = cell)• Ecology - The study of the interrelations

between organisms and their environment (eco = house)

• Genetics - The study of genes and heredity (gene = origin, birth)

• Microbiology - The study of bacteria and other microscopic organisms (micro = small)

• Zoology - The study of animals (zoo = animal)