1. Hierarchy of Biological Organization
Levels of Organization

2. Life is organized Life is highly organized into structural levels.
Each level builds on the levels below it.

3. Atoms Chemical building blocks of mater
Organized into biological molecules

4. Organelles
Molecules are organized into small structures called organelles
Organelles are the components of cells

5. Cells Subunits of organisms.
Cell is the smallest unit capable of all life functions
Some organisms are only 1 cell.
Ex. Amoeba
Types of Blood cells
AMOEBA

6. Tissues Similar cells are grouped into tissues.
Nervous tissue, epithelial tissue, muscle tissue, connective tissue

7. Organs Specific arrangement of different tissue form organs
Heart, lung, kidney
Organs form organ systems like the nervous system

8. Organ Systems
When organs work together they form systems. Ex. Circulatory system

9. Organism
All the other parts form an organism that is part of a larger population.
Can continue to communities, ecosystems, and biosphere.

10. Beyond Individual Organism
There are tiers beyond the individual.
Population: A group of species
Community: Groups of populations of species
Ecosystem: Community interactions that include non-living features.

11. Emergent Properties
Each step upward in the hierarchy of order, different properties emerge that were not present at the simpler level of organization.
Ex: Properties of proteins have attributes that were not exhibited by any of it’s component atoms.

12. Emergent Properties Cont.
Emergent properties are integral to the formation of life as non-living things are organized into what we perceive life to be.
This is what “life”
resists a simple
one-sentence
definition.