1. Levels of Organization
Biology 10(C)

2. Objectives for August 25/26, 2016
Identify the biological levels of organization
Relate levels of organization to each other
After this lesson, you will know the levels of organization. You will also be able to relate the levels to each other.

3. Warm Up List the 8 characteristics of living things. Made of cells
Reproduce
Genetic Code
Grow and Develop
Use energy
Respond to stimulus
Homeostasis
Adapt
Remember that ecologists study interactions among and between living things. By having clear levels of organization, ecologists can break apart interactions and make a complex system clearer.

4. Card Sort Put the cards I give you in order from smallest to largest.
I will come around and assist you.
Next – Handout notes
Start at the bottom of the pyramid 

5. Levels of Organization
Atom – smallest unit of an element. (elements = H, O, C)
Hydrogen atom
Molecule – two or more atoms bonded together
DNA
The levels of organization start at a very small measurement.
An atom is the smallest representative unit of an element. These atoms can bond together to form molecules. Molecules can be small, such as water molecules, or very long, such as DNA molecules. Either way, molecules are simply two or more atoms bonded together.

6. Levels of Organization
Molecule – two or more atoms bonded together
DNA
Cell – smallest unit capable of characteristics of life
Skin cell
Cells are composed of many different molecules. For example, molecules of DNA compose the genetic material of a cell. Phospholipid molecules compose the cellular membrane. While these cells are simply many different molecules in one space, cells can be capable of all of the characteristics of life, such as metabolizing energy and reproducing. Cells are the smallest level of organization considered to be alive.

7. Levels of Organization
Cell – smallest unit capable of characteristics of life
Skin cell
Tissue – similar cells working together to fulfill a function
Epithelial (Skin) layer
In multicellular organisms, cells work together. A group of similar cells working together to fulfill a function is called a tissue. For example, an epithelial layer is composed of many epithelial cells.

8. Levels of Organization
Tissue – similar cells working together to fulfill a function
Epithelial (Skin) layer
Organ – different tissues working together to fulfill a function
Stomach
Many different tissues work together to compose an organ. For example, different epithelial, connective, and muscle tissue compose the stomach, where food is digested.

9. Levels of Organization
Organ – different tissues working together to fulfill a function
Stomach
Organ system – different organs working together to fulfill a function
Digestive system
Multiple organs work together to fulfill a larger function. While the stomach digests food, it must work with the tongue, esophagus, liver, and intestine in order for food to become fuel for cells.

10. Image by Aaron Logan [CC-BY-1.0
Levels of Organization
Organ system – different organs working together to fulfill a function
Digestive system
Organism – an individual life form, composed of at least one cell
Flamingo
Many organisms are composed of multiple organ systems working together. For example, flamingos have digestive, muscular, cardiovascular, reproductive, and nervous systems. Organisms are capable of all of the characteristics of life. Note that some organisms are single-celled, which means they do not have tissues, organs, or organ systems. They are simply one cell
Image by Aaron Logan [CC-BY-1.0

11. Levels of Organization
Organism – an individual life form, composed of at least one cell
Flamingo
Population – multiple organisms of one species that live in one area
Flock of flamingos
Many individuals of one type of organism found in one area at a given time make up a population. For example, a flock of flamingos at a watering hole is a population.
Image by Aaron Logan [CC-BY-1.0
Image by Tony Hisgett [CC-BY-2.0]

12. Levels of Organization
Population – multiple organisms of one species that live in one area
Flock of flamingos
Community – different populations living in an area
Flocks of flamingos, other birds, and fish
Different species are often found in one area. The multiple different species found in one are a community. For example, flocks of spoonbills live among flocks of flamingos. Individual reed plants also make up a population that is a part of this community.
Image by Luis Nunes Alberto
[CC-BY-SA-3.0]
Image by Tony Hisgett [CC-BY-2.0]

13. Image by Luis Nunes Alberto
Levels of Organization
Community – different populations living in an area
Flocks of flamingos, other birds, and fish
Ecosystem – all of the populations in one area and their environment
A Florida wetland
When the nonliving environment is also analyzed, this level of organization is a called an ecosystem. For example, a Florida wetland includes the populations of flamingos, spoonbills, and reeds in addition to the water, soil, and weather.
Image by Luis Nunes Alberto
[CC-BY-SA-3.0]
Image by Peripitus
(Own work) [GFDL]

14. Images by Alex Zorach and M. Readey
Levels of Organization
Ecosystem – all of the populations in one area and their environment
A Florida wetland
Biome – similar ecosystems found across the Earth
Rain Forest
Images by Alex Zorach and M. Readey
(Own work) [GFDL]
Similar ecosystems are found across the world. These similar ecosystems can be grouped into a biome. For example, many different specific wetlands make up the wetlands biome.
Image by Peripitus
(Own work) [GFDL]

15. Images by Alex Zorach and M. Readey
Levels of Organization
Biome – similar ecosystems found across the Earth
Wetlands
Biosphere – all of the ecosystems on Earth
Most of the Earth
Images by Alex Zorach and M. Readey
(Own work) [GFDL]
When all of interacting biomes are analyzed, this level of organization is the biosphere. This is the region on Earth where life exists and encompasses most of the Earth.

16. Card Sort – Try Again! 5 MINUTE CELL PHONE BREAK Biosphere Biome
Ecosystem
Community
Population
Organism
Organ System
Organ
Tissue
Cell
Molecule
Atom
5 MINUTE CELL PHONE BREAK

17. Food Chains
Food Chain
A single pathway of feeding relationships in an ecosystem
Draw this example in the space provided

18. Food Web Multiple food chains in an ecosystem
Draw this example in the space provided
Arrows = Energy!!

19. Trophic Levels Handout

20. Exit Slip Write the smallest and largest level of organization.
Draw the 4 trophic levels triangle.
What is the 10% rule?
PUT NOTES IN FOLDER BRADS – 3 hole punch
You should now know the levels of organization and be able to relate the levels to each other.