MCB3023 EXAM #4 QUESTIONS AND
ANSWERS 100% CORRECT
ANSWERS
of the production of large amounts of acid, resulting in acidosis. - ANSWER-When
the diet of a ruminant is drastically changed from grass to a starch rich diet, the
ruminant may become very ill or die because:
of the production of large amounts of acid, resulting in acidosis.
the starch is broken down very slowly and the rumen becomes clogged.
the microbes in the rumen cannot break down starch.
they lack a source of protein.
at least one fungal heterotrophic partner and at least one phototrophic partner -
ANSWER-Lichens contain:
at least one fungal heterotrophic partner and at least one phototrophic partner
chemolithoautotrophs
root nodules
a heterotrophic partner and at least one fungal phototrophic partner
Rhizobia - ANSWER-The bacterial group that is responsible for root nodule
formation in legumes is:
Rhizospheres
Rhodobacter
Rhizobia
Roseobacter
colonic fermentation - ANSWER-Humans have a:
stomach fermentation
colonic fermentation
cecal fermentation
,rumen fermentation
oxygen supply - ANSWER-Leghemoglobin produced by plants is important for:
phosphorous assimilation
acidosis
oxygen supply
nodule formation
corals - ANSWER-Which of these contains zooxanthellae as photosynthetic
symbionts?
corals
lichen
termites
tubeworms
From nitrogen fixing bacteria in their gut. - ANSWER-How do termites obtain
nitrogen in their diet?
From nitrogen fixing bacteria in their gut.
From digestion of wood.
From digestion of lignin.
From digestion of cellulose.
nod - ANSWER-These genes are important for root nodule formation:
nod
nar
nir
nif
methanogens - ANSWER-The majority of Archaea found in the human intestinal tract
are _____ .
methanogens
sulfate-reducing bacteria
, halobacteria
sulfide oxidizing bacteria
A symbiont that lives inside plant cells. - ANSWER-What is an endophyte?
A symbiont that lives inside plant cells.
A member of the plant root rhizosphere.
A parasite of a plant.
A parasite of an animal.
All microbes that live on or within the human body. - ANSWER-What is the human
microbiome composed of?
Only microbes that live on human skin.
All microbes that live on or within the human body.
Only microbes that live in the intestinal tract of humans.
Only microbes that contribute to the health of humans.
Photosynthetic symbionts of corals - ANSWER-What are Zooxanthellae?
Photosynthetic symbionts of corals
Symbionts of ruminants
Heterotrophic symbionts of corals
Symbionts of tubeworms at hydrothermal vents
nitrogen fixation genes - ANSWER-Most primary endosymbionts of insects have all
these in common, EXCEPT:
maternal transmission
are required for survival or fertility
nitrogen fixation genes
highly reduced genomes
sheep - ANSWER-An example of a rumen fermenter is the:
human
ANSWERS 100% CORRECT
ANSWERS
of the production of large amounts of acid, resulting in acidosis. - ANSWER-When
the diet of a ruminant is drastically changed from grass to a starch rich diet, the
ruminant may become very ill or die because:
of the production of large amounts of acid, resulting in acidosis.
the starch is broken down very slowly and the rumen becomes clogged.
the microbes in the rumen cannot break down starch.
they lack a source of protein.
at least one fungal heterotrophic partner and at least one phototrophic partner -
ANSWER-Lichens contain:
at least one fungal heterotrophic partner and at least one phototrophic partner
chemolithoautotrophs
root nodules
a heterotrophic partner and at least one fungal phototrophic partner
Rhizobia - ANSWER-The bacterial group that is responsible for root nodule
formation in legumes is:
Rhizospheres
Rhodobacter
Rhizobia
Roseobacter
colonic fermentation - ANSWER-Humans have a:
stomach fermentation
colonic fermentation
cecal fermentation
,rumen fermentation
oxygen supply - ANSWER-Leghemoglobin produced by plants is important for:
phosphorous assimilation
acidosis
oxygen supply
nodule formation
corals - ANSWER-Which of these contains zooxanthellae as photosynthetic
symbionts?
corals
lichen
termites
tubeworms
From nitrogen fixing bacteria in their gut. - ANSWER-How do termites obtain
nitrogen in their diet?
From nitrogen fixing bacteria in their gut.
From digestion of wood.
From digestion of lignin.
From digestion of cellulose.
nod - ANSWER-These genes are important for root nodule formation:
nod
nar
nir
nif
methanogens - ANSWER-The majority of Archaea found in the human intestinal tract
are _____ .
methanogens
sulfate-reducing bacteria
, halobacteria
sulfide oxidizing bacteria
A symbiont that lives inside plant cells. - ANSWER-What is an endophyte?
A symbiont that lives inside plant cells.
A member of the plant root rhizosphere.
A parasite of a plant.
A parasite of an animal.
All microbes that live on or within the human body. - ANSWER-What is the human
microbiome composed of?
Only microbes that live on human skin.
All microbes that live on or within the human body.
Only microbes that live in the intestinal tract of humans.
Only microbes that contribute to the health of humans.
Photosynthetic symbionts of corals - ANSWER-What are Zooxanthellae?
Photosynthetic symbionts of corals
Symbionts of ruminants
Heterotrophic symbionts of corals
Symbionts of tubeworms at hydrothermal vents
nitrogen fixation genes - ANSWER-Most primary endosymbionts of insects have all
these in common, EXCEPT:
maternal transmission
are required for survival or fertility
nitrogen fixation genes
highly reduced genomes
sheep - ANSWER-An example of a rumen fermenter is the:
human
