BSC 111 Prin Of Bio Sci II Chapter 21
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Simplest but most diverse of eukaryotes - CORRECT ANSWER - Protists
Eukaryotic cells and engulfed free-living bacterium developed symbiotic relationship within host
cell - CORRECT ANSWER - Endosymbiosis
green filamentous algae - CORRECT ANSWER - Spirogyra
Mixotrophic protozoa - CORRECT ANSWER - Euglena
Able to combine autotrophic and heterotrophic nutritional modes - CORRECT ANSWER -
Mixotrophic
(Spores) dormant phases of protist life cycle that can survive until favorable conditions return;
formed by parasitic protists for transfer to new host - CORRECT ANSWER - Cysts
organisms suspended in the water that serve as food for heterotrophic protists and animals -
CORRECT ANSWER - Plankton
Groups belonging to same evolutionary lineage - CORRECT ANSWER - Monophyletic
a high level taxonomic group below domain and above kingdom; represents separate
evolutionary lineage - CORRECT ANSWER - Supergroup
Have atypical or absent mitochondria and distinctive flagella and/or deep oral grooves -
CORRECT ANSWER - Excavates
, Single-felled, flagellated excavate that is endosymbiont of animals; able to survive in anaerobic
environments; lack mitochondria; rely on fermentation for ATP production - CORRECT
ANSWER - Parabasilid and diplamonad
Excavates with two nuclei or two sets of flagella - CORRECT ANSWER - Diplomonad
Diplomonad that forms cysts, is transmitted by contaminated water, attached to intestinal wall,
and causes diarrhea - CORRECT ANSWER - Giardia lamblia
Excavates that have unique fibrous connection with Golgi apparatus and flagella - CORRECT
ANSWER - Parabasalids
members of Excavata that possess mitochondria; lack cell wall and instead have strips of proteins
encircling cell - CORRECT ANSWER - Euglenozoans
small, single-celled, freshwater organisms; very diverse in metabolic processes; have two flagella
one much longer than the other; reproduce by longitudinal cell division; their chloroplasts are
surrounded by three membranes - CORRECT ANSWER - Euglenids
single-celled, flagellated protozoans that have distinctive kinetoplasts - CORRECT
ANSWER - Kinetoplastids
includes two large subgroups: alveolates and stramenophiles - CORRECT ANSWER -
Chromalveolata
have alveoli (small air sacs) lying just beneath their plasma membranes; single-celled organisms
- CORRECT ANSWER - Alveolates
single-celled, photoautotrophic algae encased by protective cellulose and silicate plates; typically
have two flagella, one acting as a rudder and other spins cell; yellow-green to brown color;
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Simplest but most diverse of eukaryotes - CORRECT ANSWER - Protists
Eukaryotic cells and engulfed free-living bacterium developed symbiotic relationship within host
cell - CORRECT ANSWER - Endosymbiosis
green filamentous algae - CORRECT ANSWER - Spirogyra
Mixotrophic protozoa - CORRECT ANSWER - Euglena
Able to combine autotrophic and heterotrophic nutritional modes - CORRECT ANSWER -
Mixotrophic
(Spores) dormant phases of protist life cycle that can survive until favorable conditions return;
formed by parasitic protists for transfer to new host - CORRECT ANSWER - Cysts
organisms suspended in the water that serve as food for heterotrophic protists and animals -
CORRECT ANSWER - Plankton
Groups belonging to same evolutionary lineage - CORRECT ANSWER - Monophyletic
a high level taxonomic group below domain and above kingdom; represents separate
evolutionary lineage - CORRECT ANSWER - Supergroup
Have atypical or absent mitochondria and distinctive flagella and/or deep oral grooves -
CORRECT ANSWER - Excavates
, Single-felled, flagellated excavate that is endosymbiont of animals; able to survive in anaerobic
environments; lack mitochondria; rely on fermentation for ATP production - CORRECT
ANSWER - Parabasilid and diplamonad
Excavates with two nuclei or two sets of flagella - CORRECT ANSWER - Diplomonad
Diplomonad that forms cysts, is transmitted by contaminated water, attached to intestinal wall,
and causes diarrhea - CORRECT ANSWER - Giardia lamblia
Excavates that have unique fibrous connection with Golgi apparatus and flagella - CORRECT
ANSWER - Parabasalids
members of Excavata that possess mitochondria; lack cell wall and instead have strips of proteins
encircling cell - CORRECT ANSWER - Euglenozoans
small, single-celled, freshwater organisms; very diverse in metabolic processes; have two flagella
one much longer than the other; reproduce by longitudinal cell division; their chloroplasts are
surrounded by three membranes - CORRECT ANSWER - Euglenids
single-celled, flagellated protozoans that have distinctive kinetoplasts - CORRECT
ANSWER - Kinetoplastids
includes two large subgroups: alveolates and stramenophiles - CORRECT ANSWER -
Chromalveolata
have alveoli (small air sacs) lying just beneath their plasma membranes; single-celled organisms
- CORRECT ANSWER - Alveolates
single-celled, photoautotrophic algae encased by protective cellulose and silicate plates; typically
have two flagella, one acting as a rudder and other spins cell; yellow-green to brown color;
