Bio 272 Exam with Verified Answers
chlamydias - Correct Answers -gram-neg bacteria, parasites that live within animal cells,
sexually transmitted
spirochetes - Correct Answers -helical heterotrophs, many are free-living, some are
parasites (one causes syphilis)
symbiosis - Correct Answers -an ecological relationship in which two species live in
close contact, a larger host and smaller symbiont
mutualism - Correct Answers -both symbiotic organisms benefit
commensalism - Correct Answers -one organism benefits while neither harming nor
helping the other
cyanobacteria - Correct Answers -photoautotrophs that generate O2. plant chloroplasts
likely evolved from these by endosymbiosis
alpha proteobacteria - Correct Answers -subgroup of proteobacteria, mitochondria
evolved from these by endosymbiosis. rhizobium, agrobacterium examples
beta proteobacteria - Correct Answers -nutritionally diverse group of proteobacteria
gamma proteobacteria - Correct Answers -autotrophic sulfer bacteria, includes some
heterotrophic pathogens such as salmonella, e coli
delta proteobactera - Correct Answers -includes the slime0secreting myxobacteria. in
unfavorable conditions, cells congregate into a fruiting body that release resistant
myxospores that form new colonies.
epsilon proteobacteria - Correct Answers -most are pathogenic. cause stomach
problems
decomposers - Correct Answers -chemoheterotrophs function as
nitrogen, phosphorus, and potassium - Correct Answers -prokaryotes can increase the
availability of
parasitism - Correct Answers -when an organism harms but does not kill its host
chlamydias - Correct Answers -gram-neg bacteria, parasites that live within animal cells,
sexually transmitted
spirochetes - Correct Answers -helical heterotrophs, many are free-living, some are
parasites (one causes syphilis)
symbiosis - Correct Answers -an ecological relationship in which two species live in
close contact, a larger host and smaller symbiont
mutualism - Correct Answers -both symbiotic organisms benefit
commensalism - Correct Answers -one organism benefits while neither harming nor
helping the other
cyanobacteria - Correct Answers -photoautotrophs that generate O2. plant chloroplasts
likely evolved from these by endosymbiosis
alpha proteobacteria - Correct Answers -subgroup of proteobacteria, mitochondria
evolved from these by endosymbiosis. rhizobium, agrobacterium examples
beta proteobacteria - Correct Answers -nutritionally diverse group of proteobacteria
gamma proteobacteria - Correct Answers -autotrophic sulfer bacteria, includes some
heterotrophic pathogens such as salmonella, e coli
delta proteobactera - Correct Answers -includes the slime0secreting myxobacteria. in
unfavorable conditions, cells congregate into a fruiting body that release resistant
myxospores that form new colonies.
epsilon proteobacteria - Correct Answers -most are pathogenic. cause stomach
problems
decomposers - Correct Answers -chemoheterotrophs function as
nitrogen, phosphorus, and potassium - Correct Answers -prokaryotes can increase the
availability of
parasitism - Correct Answers -when an organism harms but does not kill its host
