|
1
|
|
|
2
|
|
|
3
|
- Heterotrophic bacteria
- Photoautotrophic cyanobacteria
|
|
4
|
|
|
5
|
|
|
6
|
|
|
7
|
|
|
8
|
|
|
9
|
- Gram positive cocci and gram negative rods
|
|
10
|
|
|
11
|
|
|
12
|
|
|
13
|
|
|
14
|
- Photoautotrophs - light for energy, and CO2 for carbon.
- Photoheterotrophs - light for energy, but need complex carbons as carbon
source.
- Chemoautotrophs - can use chemical energy (oxidize inorganics eg H2S)
but only need CO2 of carbon source.
- Chemoheterotrophes - use chemical energy, and need complex carbon
sources.
|
|
15
|
- Chemoheterotrophs
- Saprobes - decomposers absorb nutrients from dead organic matter.
- Parasites - absorb nutrients from body fluids of living host.
|
|
16
|
- Obligate aerobes - need O2 for cellular respiration.
- Facultative anaerobes - can use O2 if present but will
survive without it.
- Obligate anaerobes - die in the presence of O2.
|
|
17
|
- Nitrogen Fixation – the conversion of atmospheric N2 into
ammonia (NH3).
|
|
18
|
- Methanogens - faculatative anaerobes
reduce CO2 to methane.
- Extreme halophiles - live in very salty water.
- Thermoacidophiles - live in hot, acid habitats.
|
|
19
|
|
|
20
|
- Chemoautotrophic bacteria - oxidize NH3 - live in aerated
soil.
- Cyanobacteria - photoautotrophs freshwater and oceans.
- Nitrogen-fixing aerobic bacteria - fix N2 into NH3
and NO2, NO3.
|
|
21
|
- Light absorbing pigments to protect against UV light
- Cyanobacteria evolved between 2.5 and 3.4 billion years ago.
- Released Oxygen as a by-product of their photosynthesis.
- Oxygen rich atmosphere changed the evolution of other heterotrophic
prokaryotes - cellular respiration.
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|
22
|
|
|
23
|
|
|
24
|
|
|
25
|
- Prokaryotes in Chemical Cycles
- Decomposers
- Autotrophic Bacteria
- Symbiotic Bacteria
- Mutualism
- Commensalism
- Parasitism
|
|
26
|
- Food production
- Medical/pharmaceuticals
- Waste treatment
- Biotechnology
|
|
27
|
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Notes