1. The Scope of Biology
Chapter One

2. Biology explores life at many levels
All parts of the planet that are living
A community of living things along with non-living environment
Individual living things
Functioning units that make up living things
Molecule of inheritance that contains the instructions the cell needs to make other molecules

3. Biology explore life in diverse forms
How many ways can we classify these animals?

4. The broadest category is a DOMAIN…
In Biology, the 1.5 million identified species of life have been classified into groups based on evolutionary relatedness and physical characteristics
The broadest category is a DOMAIN…
Archaea \ Both are Prokaryotic (without
Bacteria / nuclei) and Unicellular
Eukarya Eukaryotic (DNA inside nuclei)
Unicellular → Protista
Multicellular → Fungi, Plantae,
and Animalia

5. Linnaean Classification Groups
Kingdom
Phylum
Class
Order
Family
Genus
Species
“Kings Play Chess On Fat Green Stools”

6. Themes or characteristics that unify the study of life
The Cellular Basis of Life
All living things are made of cells
Multicellular organisms depend on the function and interaction of many specialized cells for survival and development
Growth and Development
Living things grow by cell division
Form-fits-Function theme

7. Reproduction and Inheritance
All living things contain DNA. DNA is contained in genes.
All living things must pass on their genes through reproduction to survive as a species
Interaction with the Environment
Living things respond to stimuli
Examples: Light, motion, temperature, touch, precipitation
Energy and Life
PHOTOSYNTHESIS: Plants use sun’s energy plus CO2 and H2O to make food
We call them PRODUCERS because they produce the food that an ecosystem depends on
CONSUMERS have to eat their food (or energy)

8. Adaptation and Evolution
Regulation
All living things have to regulate their internal environment
They maintain a “steady-state” or homeostasis
Adaptation and Evolution
Collectively as a group, all living things change over time. This is called…
EVOLUTION
Species or populations evolve by a process called natural selection
Adaptations enable some organisms to survive better than others