Levels of organization of life -
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Levels of Levels of OrganizationOrganization
of Lifeof Life
Presentation based on one from http://people.hofstra.edu/geotrans/eng/ch8en/conc8en/envisys.html
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AtomMolecule
MacromoleculeOrganelle
CellTissueOrganSystem
OrganismPopulationCommunity
EcosystemEcosphere
GAIA
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ATOMS
• Smallest part of matter
• NON-living
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Molecules
• 2 or more bonded atoms
• Form compounds
• NON-living
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Organic Organic molecules carbohydrates,
proteins, lipids and nucleic acids.
Inorganic Inorganic molecules Water, Salts
And vitamins.
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Macromolecule
• Very large molecules
•NON-living
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Organelles
• “Tiny organs”
• Made of macromolecules
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Cell
• Made of organelles
• Basic unit of structure & function
• LIVING
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Tissue
• The same kind cell working together
• Living
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A A tissuetissue is a group of cells of similar is a group of cells of similar
structure that perform a shared functionstructure that perform a shared functionAnimal tissues:
muscle
nervous
upper epidermal tissue
palisade mesophyll tissue
spongy mesophyll tissue
lower epidermal tissue
Tissues found in the leaf
Cross-section of a leaf
Slide taken from clickbiology.com
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Organs
• Tissues that work together
• Living
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An An organorgan is a structure made of a group of tissues is a structure made of a group of tissues
working together to perform specific functionsworking together to perform specific functions
Plant organs include the stem and the leaves
heart
stomach
lungs liver
brain kidneys
Slide taken from clickbiology.com
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An organ system is a group of organs that An organ system is a group of organs that
coordinate to perform related functionscoordinate to perform related functions
In plants the shoot is an organ system consisting of leaves and the stem
lymphaticsystem
respiratorysystem
digestivesystem
excretory
system
reproductivesystem
muscularsystem
skeletalsystem
nervoussystem
endocrinesystem
circulatorysystem
Slide taken from clickbiology.com
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Systems
• Organs that work together
• Living
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Organism
• Entire living things (organisms)
• Usually made of systems
• May be a single cell
• Living
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What type of organism is this?Unicellular or pluricellular?
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Population
• Same type of organism living together
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Community
• Several populations living together
• Population interact
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Ecosystem• A biotic (living) community plus the abiotic (nonliving) features
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Biome
• Similar ecosystems on earth together
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Ecosphere
• Whole living layer around the globe
• Includes abiotic features
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Who is GAIA?Who is GAIA?Im
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Who is GAIA?Who is GAIA?• In Greek mythology, Gaia was a Titan who
personified EarthEarth. She was the mother of several later Titans, including Cronus, Rhea, Iapetus (father of Atlas), and Oceanus. She was worshipped as the Earth mother the Earth mother goddess.
• http://robinfowler.suite101.com/who-is-gaia--a11020#ixzz1YJfggRBL
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Can you write the levels of
organization of life?
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AtomMolecule
MacromoleculeOrganelle
CellTissueOrganSystem
OrganismPopulationCommunity
EcosystemEcosphere
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Now, say an example ofNow, say an example ofAtom
MoleculeMacromolecule
OrganelleCell
TissueOrganSystem
OrganismPopulationCommunity
EcosystemEcosphere
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AtomMolecule
MacromoleculeOrganelle
CellTissueOrganSystem
OrganismPopulationCommunity
EcosystemEcosphere
Now, say an example ofNow, say an example of
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AtomMolecule
MacromoleculeOrganelle
CellTissueOrganSystem
OrganismPopulationCommunity
EcosystemEcosphere
Now, say an example ofNow, say an example of
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AtomMolecule
MacromoleculeOrganelle
CellTissueOrganSystem
OrganismPopulationCommunity
EcosystemEcosphere
Now, say an example ofNow, say an example of
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AtomMolecule
MacromoleculeOrganelle
CellTissueOrganSystem
OrganismPopulationCommunity
EcosystemEcosphere
Now, say an example ofNow, say an example of
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AtomMolecule
MacromoleculeOrganelle
CellTissueOrganSystem
OrganismPopulationCommunity
EcosystemEcosphere
Now, say an example ofNow, say an example of
![Page 33: Levels of organization of life -](https://reader035.fdocuments.in/reader035/viewer/2022062312/555f3d64d8b42a65118b57bf/html5/thumbnails/33.jpg)
AtomMolecule
MacromoleculeOrganelle
CellTissueOrganSystem
OrganismPopulationCommunity
EcosystemEcosphere
Now, say an example ofNow, say an example of
![Page 34: Levels of organization of life -](https://reader035.fdocuments.in/reader035/viewer/2022062312/555f3d64d8b42a65118b57bf/html5/thumbnails/34.jpg)
AtomMolecule
MacromoleculeOrganelle
CellTissueOrganSystem
OrganismPopulationCommunity
EcosystemEcosphere
Now, say an example ofNow, say an example of
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• http://1.bp.blogspot.com/-u6U98UbaBjA/TViHmtnm_-I/AAAAAAAAEqg/YARN9kC4PPY/s1600/Green%252BEarth%252BEcology%252BwAl%252Btangledwing.png
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• www.Biodeluna.wordpress.com
Based on: http://people.hofstra.edu/geotrans/eng/ch8en/conc8en/envisys.html with some slides added from clickbiology.com plus personal adds.