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Archeabacteria & Eubacteria
*These 2 kingdoms are sometimes still grouped together as ‘Monera’
Archaebacteria are ancient bacteria and live in the harshest conditions
(very hot, very salty, in digestive guts)
Eubacteria – ‘true’ bacteria – are more common.
Both are ‘prokaryotic’ and have a single strand of genetic information
floating in the cytoplasm. There is no organized ‘nucleus’.
Bacteria – are the oldest and most abundant group of living organisms.
Some have fossil records! Some lived in harshest conditions (like our
early Earth). Cyanobacteria (also called blue-green algae, but are NOT
algae persay) helped, through photosynthesis, to provide early Earth
with oxygen.
Bacteria are most often responsible for decomposing dead organic
matter into useable inorganic compounds for plants/animals. They can
cause disease (strep throat, tetanus, gangrene, bubonic plague, cholera
etc.) and can be helpful too (food digestion, fixation of nitrogen in soil
for plants, production of dairy products, can ‘eat’ some harmful
materials).
Homework: Read ‘Monera’ in text 9.3
p. 344 #1-7 p. 346 # 8,9,10