Prokaryotes – Bacteria and Archea No membrane bound organelles Large surface area to volume ratio Asexual reproduction by binary fusion Single celled or.
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Prokaryotes – Bacteria and Archea
No membrane bound organelles
Large surface area to volume ratio
Asexual reproduction by binary fusion
Single celled or colonial
Anaerobic metabolism – what’s going on in the hypolimnion of a stratified, anoxic lake?
Chemoheterotrophs and Photohetertrophs – using active transport, more efficient at low nutrient concentrations
Photoautotrophs – i.e. cyanobacteria (blue-green algae)
Ecology
Diapause – it may be that the dormancy is very important in bacteria
Protista – Protozoa and algae
Eukaryotic (membrane bound organelles, nucleus, mitochondria, chloroplasts in photosynthetic protists)
Single celled (although may be colonial)
Photoautotrophic Protista – Algae
Single celled or colonial
Floating
Phytoplankton
Benthic algae
Attached to surfaces (rocks, sediment)
Chrysophyta (Golden-brown algae) Diatoms
Brown to light greenPigment = Chl a and cSome have flagellaSilica walls – composed of 2 frustules
Reproduction - diverse
Vegetative cell
resistant cell (resting stage)
Encystment
Germination
Asexual reproduction
usually binary fission
Sexual reproduction – possibly motile gametes or conjugation tubes
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