Prokaryotes…
1
Three-dimensional (3D) computer-generated image of
Escherichia coli. CDC . https://www.cdc.gov/drugresistance/mcr1.html
, Learning objectives
Appreciate the diversity of prokaryotes.
Identify the unique characteristics of bacteria.
Distinguish among mutualism and commensalism.
Provide examples of bacteria in symbiotic relationships.
Understand the importance of bacteria in ecosystems.
Know how humans employ the metabolic diversity of
bacteria for scientific and commercial purposes.
2
, Perseverance:
Mars 2020 Mission
Astrobiology
Perseverance is looking for biosignatures of
ancient microbial life in the geological
record.
Biosignatures are “any characteristic,
element, molecule, substance, or feature
that can be used as evidence for past or
present life…needs to be something that
can’t be made without the presence of life”
(NASA, Astrobiology, 2021).
Mars Science Team Investigate Ancient life
in Australia in preparation for the Mars
2020 mission. 3:03
This Photo by Unknown Author is licensed under CC BY-SA
3
1
Three-dimensional (3D) computer-generated image of
Escherichia coli. CDC . https://www.cdc.gov/drugresistance/mcr1.html
, Learning objectives
Appreciate the diversity of prokaryotes.
Identify the unique characteristics of bacteria.
Distinguish among mutualism and commensalism.
Provide examples of bacteria in symbiotic relationships.
Understand the importance of bacteria in ecosystems.
Know how humans employ the metabolic diversity of
bacteria for scientific and commercial purposes.
2
, Perseverance:
Mars 2020 Mission
Astrobiology
Perseverance is looking for biosignatures of
ancient microbial life in the geological
record.
Biosignatures are “any characteristic,
element, molecule, substance, or feature
that can be used as evidence for past or
present life…needs to be something that
can’t be made without the presence of life”
(NASA, Astrobiology, 2021).
Mars Science Team Investigate Ancient life
in Australia in preparation for the Mars
2020 mission. 3:03
This Photo by Unknown Author is licensed under CC BY-SA
3
