Lab 1 Flashcards
Classification system
Domain Kingdom Phylum Class Order Family Genus Species
Prokaryotes
No nucleus
DNA is circular
Lack membrane bound organelles
Cell walls contain peptidoglycanf
3 Shapes
Coccus (Sphere)
Bacillus (rod)
Spirillum (Spiral)
Bacteria Classification
Unicellular
Binary fission
Heterotrophic (mostly)
Cyanobacteria
blue-green algae unicellular but colonial chlorophyll w/o plastids binary fission autotrophic
Gleocapsa
Colonies in a sheath
individuals have sheath (Larger organisms w/ fewer, green, visible internal mater, Bacillus)
Microcystis
Many individuals w/o sheath but have common sheath. polluted water. (Many small organisms, yellow brown)
Oscillatoria
Many disk cells aligned in row. Glide back and forth. (disk shape makes alignment appear very straight)
Spirulina
Spiral shaped
used in food and medicine
high protein (appear less ordered than Oscillatoria)
Anabena
Coccus shaped in long strands not all are the same
Typical Anabaena cell
Most common
Anabaena Heterocysts
Nitrogen Fixing, no chlorophyll
Appear round and smooth
Anabaena Akinetes
House spores
Appear oblong and rough
Obligate anaerobes
Can only survive and multiply in the absence of free oxygen
Facultative anaerobes
Can survive w/o oxygen but thrive with oxygen
