THE DIVERSITY OF LIFE

Monerans •Prokaryotic •Unicellular •Mostly heterotrophs, but some are autotrophs Cyanobacteria •Divide by binary fission •Complex cell walls •Include Eubacteria and Archaebacteria •Some

A LOOK AT THE DIVERSITY

OF LIFE

Prokaryotic vs Eukaryotic Cell

a.k.a Monerans

•Prokaryotic

•Unicellular

•Mostly heterotrophs, but

some are autotrophs (Cyanobacteria)

•Divide by binary fission

•Complex cell walls

•Include Eubacteria and Archaebacteria

•Some put Archaebacteria in separate kingdom because they live in extreme environments and are chemoautotrophs

•Eukaryotic

•Uni- and multicellular forms

•Both heterotrophic (protozoa) and autotrophic forms (algae)

•Most live in water

•Dumping ground of classification

•Examples: Paramecia,

Amoeba, Dinoflagellates,

diatoms, red and green algae

•Eukaryotic

•Generally multicellular

(yeast is unicellular)

•Heterotrophic

•Cell walls made of chitin

•Form thread-like strands called

hyphae

•Externally digest food; secrete enzymes and absorb nutrients

Examples: mushrooms, athlete’s foot, yeast

•Eukaryotic

•Autotrophic, use photosynthesis (contain chlorophyll

•Multicellular

•Cell walls made of cellulose

•Large central vacuole

•Examples: mosses, ferns, conifers,

angiosperms

•Eukaryotic

•Multicellular

•No cell wall

•Heterotrophs

•Internal digestion

•Motile

•Mostly sexual

reproduction

•Examples: sponges,

jellyfish, worms, mollusks, arthropods, fish, humans

Kingdoms and Domains

Bacteria Archaea Eukarya

Bacteria Archaea Protista Plantae Fungi Animalia

Monera Protista Plantae Fungi Animalia

The three-domain

system

The six-kingdom system

The traditional five-kingdomsystem