1. 1-1: What is LIFE? How do we study LIFE?
VOCABULARY:
Biology
Cell
Sexual reproduction
Asexual reproduction
Metabolism
Homeostasis
Respond
Evolve

2. 1) Living things are ORGANIZED.
What are some characteristics of living things? What does it mean to be “ALIVE”?
1) Living things are ORGANIZED.

3. 1) Living things are ORGANIZED.
Made up of cells
UNICELLULAR: one celled
MULTICELLULAR: many celled
Unicellular Protozoans

4. Unicellular paramecium

5. Each cell contains the genetic material:
DNA

6. 2) Living things REPRODUCE.
● ASEXUAL = one parent; cell division, cloning, budding, regeneration

7. 2) Living things REPRODUCE.
● SEXUAL = two parents; sperm and egg

8. 3) Growth and Development
Growth: increase in size & formation of new structures (could be at the cellular level)
Development: cells increase in number and become different (differentiate)

9. 4) Response to the Environment
Heat
Light
Pressure
Sound
Gravity
Examples:
A plant seed only germinates when there is sufficient water and temperature.
Plant roots grow down.
Plant leaves grow towards sunlight.

10. 5) Maintaining Internal Balance
HOMEOSTASIS: process by which organisms keep their internal conditions relatively stable
Example: How do humans maintain the same body temperature?
too hot… we sweat
too cold… we shiver

11. 6) Living things require ENERGY.
All living things use energy: make their own energy or consume energy
PHOTOSYNTHESIS: using light energy to make “food” energy
METABOLISM: combination of chemical reactions through which an organism builds up or breaks down materials
Uses Metabolism
Photosynthesis

12. 7) ADAPTATION & EVOLUTION
● ADAPTATION: any structure, behavior, or internal process that enables an organism to respond to stimuli and better survive in a particular environment

13. 7) ADAPTATION & EVOLUTION
● EVOLUTION: change over time
A group of organisms can change over time
Even though an individual develops, their inherited traits do not change
leg bone in a whale

14. Branches of Biology Diversity of life is so great,
biology is separated into branches
ZOOLOGY: study animals
MICROBIOLOGY: study bacteria
BOTANY: study plants
ETHOLOGY: study animal behavior
PALEONTOLOGY: study life from the past

15. Levels of Organization
Biosphere > Ecosystem > Community > Population > Organism > Organ Systems > Organs > Group of Cells (Tissues) > Cells > Molecules > Atoms > Protons, Neutrons, Electrons