3 Domain System of Classification i) ARCHAE Primitive prokaryotes Salt-loving and heat-loving.

3 Domain System of Classification

i) ARCHAE•Primitive prokaryotes•Salt-loving and heat-loving


ii) EUBACTERIA•True -> more advanced•BGA, C – eating heterotrophic bacteria


iii) EUKARYOTA•Plants & animals•Protista, fungi, chromists…

5 Kingdom Classification

5 Kingdom ClassificationKINGDOM MONERA

All prokaryotes – unicellular, no nuclear membrane, nucleoid, no cell organelles, cell wall-peptidoglycan, ribosome (70s), sex pili

2 types: Archaebacteria & Eubacteria

5 Kingdom ClassificationKINGDOM MONERA

i)Archaebacteria No peptidoglycan – halophiles, thermophiles, acidophiles, methanogenes

ii) Eubacteria True bacteria, autotrophic, saprotrophic, parasitic, symbioticBGA – Nostoc,… (early life), BiofertilizerChemoautotrophs – H2S, NO3

-, S, Fe+2 etc.

5 Kingdom ClassificationKINGDOM PROTISTA

• Simplest eukaryotes – nucleus, nuclear membrane & cell organelles


CHRYOSOPHYTES•Diatoms & Desmids (golden algae)•Photosyn. , planktonic ; marine / fresh water•C.W-> silica (fossils – Diatomite) used in oil filtering, metal polish


DINOFLAGELLATES•Various colored photosyn., marine•C.W -> cellulosic•Eg. Gonyaulax -> Red tide on sea•2 flagellae -> transverse & longitudinal•Noctiluca – phosphorescent (glowing @ night)


EUGLENOIDS•Photoautotrophic, motile, freshwater & brackish water•No cellulosic C.W – but has protein rich pellicle•When no light, they switch to heterotrophic nutrition (ingest other protozoans)


MYXOMYCETES (slime moulds)•Cool shady places, rich in organic matter•Animal + fungi characteristics•Vegetative phase has: multinucleate protoplasm mass (plasmodium) – no CW Since no CW – slime moulds – engulf food Fruit bodies produce during unfavorable period -> sporangia & spores (with CW)


PROTOZOANSHeterotrophic / parasitic•Amoeboid - entamoeba (pseudopodia)•Flagellated - Trypasnosoma•Ciliated - Paramecium•Sporozoans (spore like, infectious stage) - Plasmodium

3 Domain System of Classification i) ARCHAE Primitive prokaryotes Salt-loving and heat-loving.

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