2. Classifying LifeClassifying Life
There are over 2 million known speciesThere are over 2 million known species
of organisms.of organisms.
All life is classified into 6 majorAll life is classified into 6 major
kingdoms.kingdoms.
3.
4. Kingdom ArchaebacteriaKingdom Archaebacteria
Bacteria live in harsh or extremeBacteria live in harsh or extreme
environmentsenvironments
UnicellularUnicellular
ProkaryoticProkaryotic
Heterotrophic orHeterotrophic or
AutotrophicAutotrophic
Cell walls withoutCell walls without
peptidoglycanpeptidoglycan
5. Most other bacteriaMost other bacteria
Live everywhereLive everywhere
Some cause diseaseSome cause disease
Some are helpfulSome are helpful
UnicellularUnicellular
ProkaryoticProkaryotic
Heterotrophic orHeterotrophic or
AutotrophicAutotrophic
Cell walls withCell walls with
peptidoglycanpeptidoglycan
6. Most “diverse” kingdomMost “diverse” kingdom
AquaticAquatic
EukaryoticEukaryotic
Mostly unicellular (algae are the exception)Mostly unicellular (algae are the exception)
Heterotrophic or autotrophicHeterotrophic or autotrophic
Ex.) Paramecium, amoeba, euglenaEx.) Paramecium, amoeba, euglena
7. EukaryoticEukaryotic
Multicellular (except yeast)Multicellular (except yeast)
Mostly terrestrialMostly terrestrial
Heterotrophic - Obtain food throughHeterotrophic - Obtain food through
absorptionabsorption
Cell walls made of chitinCell walls made of chitin
8. Eukaryotic and multicellularEukaryotic and multicellular
Cell walls made ofCell walls made of cellulosecellulose
AutotrophicAutotrophic
ChloroplastsChloroplasts
9. Multicellular and eukaryotic
Heterotrophic
Digest food internally
No cell walls
10. What do the following words have in common?What do the following words have in common?
chien, inu, perro.chien, inu, perro.
11. In science, each species is given a “scientificIn science, each species is given a “scientific
name.”name.”
Ex.)Ex.) Canis familiarisCanis familiaris (scientific name for dog).(scientific name for dog).
UniversalUniversal
Latin.Latin.
System of naming called “binomial nomenclature”System of naming called “binomial nomenclature”
Carolus LinnaeusCarolus Linnaeus
12. Genus name (first word) - always capitalizedGenus name (first word) - always capitalized
Species name (second word) - never capitalizedSpecies name (second word) - never capitalized
italics or underlineditalics or underlined
Ex.)Ex.) Homo sapienHomo sapien oror Homo sapienHomo sapien
13. Some organisms have theSome organisms have the
same genus name.same genus name.
Ex.)Ex.) Felis domesticusFelis domesticus
Felis leoFelis leo
Felis tigrisFelis tigris
Same genusSame genus
Different species.Different species.
What is a species?What is a species?