BIO 253 01 CH 4 Exam | Atcual Questions
and Answers with Verified Solutions | Latest
Updated 2026
Ubiquitous it's everywhere
Shewanella the bacterium that lives deep in the sea,
where
little oxygen diffused in water
Nanocables it is able to survive in this harsh
environment by
attaching to the sea floor and using long
appendages to sense oxygen
Halophiles some prokaryotes in extremely salty
environments
(e.g. the Dead Sea)
Halobacterium salinarum lives in the dead sea
Rhizobium nitrogen-fixing bacteria that live in the root
nodules of legumes (e.g. clover)
, Bacteroids -the micrograph of the root nodule within
the plant
cells
-bacterium-like cells or modified bacterial
cells
-visible as dark ovals within the larger plant
cell
Rickettsias require special staining methods to see
them under
a microscope
Example of Mutualism Humans have Bacteriodes
thetaiotacomicron,
which lives in the intestinal tract digesting
polysaccharide plant materials. E. coli as
well.
Example of Amensalism Some bacteria will produce substances
that kill
other species of bacteria. S. epidermis
produces
bacteriocins that defend us.
Example of Commensalism S. epidermis uses dead cells as a fuel
source.
Example of Neutralism Vegetating bacteria vs. endospores.
and Answers with Verified Solutions | Latest
Updated 2026
Ubiquitous it's everywhere
Shewanella the bacterium that lives deep in the sea,
where
little oxygen diffused in water
Nanocables it is able to survive in this harsh
environment by
attaching to the sea floor and using long
appendages to sense oxygen
Halophiles some prokaryotes in extremely salty
environments
(e.g. the Dead Sea)
Halobacterium salinarum lives in the dead sea
Rhizobium nitrogen-fixing bacteria that live in the root
nodules of legumes (e.g. clover)
, Bacteroids -the micrograph of the root nodule within
the plant
cells
-bacterium-like cells or modified bacterial
cells
-visible as dark ovals within the larger plant
cell
Rickettsias require special staining methods to see
them under
a microscope
Example of Mutualism Humans have Bacteriodes
thetaiotacomicron,
which lives in the intestinal tract digesting
polysaccharide plant materials. E. coli as
well.
Example of Amensalism Some bacteria will produce substances
that kill
other species of bacteria. S. epidermis
produces
bacteriocins that defend us.
Example of Commensalism S. epidermis uses dead cells as a fuel
source.
Example of Neutralism Vegetating bacteria vs. endospores.
