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It’s ALIVE!!! Or, is it?An Unger Power Point
All organisms have 6 characteristics
Cells
Response to stimulus
Reproduction
DNA/”Life Molecule”
Use Σ
Grow & develop
Cell
Subunit of life
Membrane-bound
2 typesProkaryoteEukaryote
Response to Stimulus
React to change
Maintain homeostatis
Reproduction
Ability to produce offspring
Asexual ReproductionONE parent
Sexual ReproductionTWO parents
DNA/”Life Molecule”
DeoxyriboNucleic Acid
Passes on hereditary information
Use Σ
Organisms take in and use energy
MetabolismSum of all chemical reactions
YOU are walking, talking, living, breathing CHEMICAL REACTIONS!
Types of Σ
Chemicals of life
CarbohydratesSugar/Σ
LipidsFat/storage for Σ
ProteinsSome Σ/ made of amino acids
Nucleic AcidsDNA & RNA
One sentence to rule them all.
Nucleic acids provide the information to make proteins, which are then used to break down carbohydrates and lipids to release energy.
Grow & Develop
GrowGet bigger
DevelopΔ form
Necessities of lifeFood
Make it (producer/autotroph)Get it (consumer/heterotroph)OTHER (decomposer)
WaterAllows metabolism to take place
AirCO2 and O2
ShelterRest & security
Proof of LIFE
Back in the day…spontaneous generation
2 experiments prove LIFE from LIFE
Redi…an Italian doc (1600’s)
Fly babies only came from flies!!!!
Pasteur…a Frenchman (1800’s)
The air also let in bacteria.
LIFE from LIFE!!!
How life is organized…
ClassificationHOW we arrange/group organisms based on similarities
EIGHT levelsDomain
Kingdom
Phylum
Class
Order
Family
Genus
Species
Does King Philip Come Over For Green Soup?
What is missing?
DOMAIN!!!
EUKARYOTE
TaxonomyTHE Science of identifying & labeling/naming organisms
Carolus Linnaeus (Swedish botanist 1750s)Binomial Nomenclature
2 name systemGenus & Species
FIRST letter of Genus is CAPITALfirst letter of species is lowercaseBOTH are ALWAYS italicized or underlined
Branching Diagrams/CladogramArrows point TO living organism
Characteristic/trait ALONG branchWhat is missing?
Classification of ALL Life!
Unicellular, Prokaryotic, Auto & Heterotrophs
Unicellular, Prokaryotic, Auto & Hetero
Multicellular, Eukaryote, Decomposer
Multi, Eukaryote, AUTO
Multi, Eukaryote, HETERO
Dichotomous Keys
A tool that helps its user identify natural objects.
Dichotomous means "divided into two parts.”
Each step has TWO choices