1. Levels of Organization of Life
Presentation based on one from

2. GAIA Ecosphere Ecosystem Organism System Organ Tissue Population
Atom
Molecule
Macromolecule
Organelle
Cell
Tissue
Organ
System
Organism
Population
Community
Ecosystem
Ecosphere
GAIA

3. ATOMS
Smallest part of matter
NON-living

4. Molecules
2 or more bonded atoms
NON-living

5. Organic molecules carbohydrates,
proteins,
lipids
nucleic acids.
Inorganic molecules
Water,
Salts
And vitamins.

6. Macromolecule Very large molecules composed of many molecules.
NON-living

7. Organelles
“Tiny organs”
Made of macromolecules

8. Cell
Made of organelles
Basic unit of structure & function
LIVING

9. Tissue
The same kind cell working together
Living

10. Tissues found in the leaf
A tissue is a group of cells of similar structure that perform a shared function
Animal tissues:
muscle
nervous
upper epidermal
tissue
palisade mesophyll
spongy mesophyll tissue
lower epidermal
Tissues found in the leaf
Cross-section of a leaf
Slide taken from clickbiology.com

11. An organ is a structure made of a group of tissues working together to perform specific functions
Plant organs include the stem and the leaves
Slide taken from clickbiology.com

12. An organ system is a group of organs that coordinate to perform related functions
lymphatic
system
digestive
system
reproductive
system
skeletal
system
endocrine
system
respiratory
system
excretory
system
muscular
system
nervous
system
circulatory
system
In plants the shoot is an organ system consisting of leaves and the stem
Slide taken from clickbiology.com

13. Organism Entire living things (organisms) Usually made of systems
May be a single cell
Living

14. Population
Same type of organism living together

15. Community
Several populations living together
Population interact

16. Ecosystem
A biotic (living) community plus the abiotic (nonliving) features

17. Biome
A Group of ecosystems that share similar characteristics and typical organisms

18. Biosphere Whole living layer around the globe
Includes abiotic features

19. How do the levels of organization relate to each other?