Bio 212 exam 2 Questions and Answers 100%
Solved
what are some habitats and reproductive lifestyles? - most protists are free-living, but
others form symbiotic associations with unrelated organisms
-Some parasitic protists are important pathogens of plants or animals
-most protits reproduce asexually, some sexually. No reproductive organs or embryos
what are some key structures of a basic free living unicellular protist? ...
What is the endosymbiotic theory? Mitochondria and chloroplast probably originated
from endosymbionts.
- Serial endosymbiosis hypothesis assumes certain organelles arose from symbiotic relationships
between larger cells and smaller bacteria incorporated to live with them
-Mitochondria may have originated as aerobic bacteria and chloroplasts may have originated as a
cyanobacterium within a host cell
What are the modern tools being used to sort ot the protist kingdom? Protist classification
is evolving: two types of research contribute substantially to understanding phylogenetic
relationships among protist
, Bio 212 exam 2 Questions and Answers 100%
Solved
-molecular analysis of the gene for small subunit ribosomal RNA, and other nuclear genes
-Ultrastructure data revealed by electron microscopy
what are the differences between the five major protist groups: (what are the 5) Excavates
Chromalvaeolates
Rhizarians
Archaeplastids
Unikots (uni-****)
-I think the differences are that they are all paraphyletic
What is an example of an Excavate? (+what are the 4 of them) Group of Unicellular
protists with flagella and a deep (excavated) oral groove
-Have atypical, modified mitochondria
-Many are endosymbionts and live in anoxic environments
-Obtain energy by glycolysis
Examples: Diplomonads, Parabasalids, Euglenoids, Trypanosomes
, Bio 212 exam 2 Questions and Answers 100%
Solved
Whats a diplomonad? Excavates with one or two nuclei, no functional mitochondria, no
golgi complex and up to 8 flagella
Example: GIARDIA, a parasitic diplomonad
-Giardia intestinalis is a major cause of water-borne diarrhea- cysts contaminate untreated
drinking water
what's a parabasilid? Anaerobic, flagellated excavates that live in animals
Example: TRICHONYMPHS
-Live in the guts of termites endosymbiotic bacteria digest cellulose in the wood
-Trichomonad causes an STD
what are Euglenoids? -Euglenoids and Trypanosomes have an unusual flagellum with
crystalline rod and atypical mitochondria
- Most are unicellular flagellates
-some photosynthetic, some heterotrophic species absorb organic compounds by phagocytosis
and digest prey in food vacuoles
Solved
what are some habitats and reproductive lifestyles? - most protists are free-living, but
others form symbiotic associations with unrelated organisms
-Some parasitic protists are important pathogens of plants or animals
-most protits reproduce asexually, some sexually. No reproductive organs or embryos
what are some key structures of a basic free living unicellular protist? ...
What is the endosymbiotic theory? Mitochondria and chloroplast probably originated
from endosymbionts.
- Serial endosymbiosis hypothesis assumes certain organelles arose from symbiotic relationships
between larger cells and smaller bacteria incorporated to live with them
-Mitochondria may have originated as aerobic bacteria and chloroplasts may have originated as a
cyanobacterium within a host cell
What are the modern tools being used to sort ot the protist kingdom? Protist classification
is evolving: two types of research contribute substantially to understanding phylogenetic
relationships among protist
, Bio 212 exam 2 Questions and Answers 100%
Solved
-molecular analysis of the gene for small subunit ribosomal RNA, and other nuclear genes
-Ultrastructure data revealed by electron microscopy
what are the differences between the five major protist groups: (what are the 5) Excavates
Chromalvaeolates
Rhizarians
Archaeplastids
Unikots (uni-****)
-I think the differences are that they are all paraphyletic
What is an example of an Excavate? (+what are the 4 of them) Group of Unicellular
protists with flagella and a deep (excavated) oral groove
-Have atypical, modified mitochondria
-Many are endosymbionts and live in anoxic environments
-Obtain energy by glycolysis
Examples: Diplomonads, Parabasalids, Euglenoids, Trypanosomes
, Bio 212 exam 2 Questions and Answers 100%
Solved
Whats a diplomonad? Excavates with one or two nuclei, no functional mitochondria, no
golgi complex and up to 8 flagella
Example: GIARDIA, a parasitic diplomonad
-Giardia intestinalis is a major cause of water-borne diarrhea- cysts contaminate untreated
drinking water
what's a parabasilid? Anaerobic, flagellated excavates that live in animals
Example: TRICHONYMPHS
-Live in the guts of termites endosymbiotic bacteria digest cellulose in the wood
-Trichomonad causes an STD
what are Euglenoids? -Euglenoids and Trypanosomes have an unusual flagellum with
crystalline rod and atypical mitochondria
- Most are unicellular flagellates
-some photosynthetic, some heterotrophic species absorb organic compounds by phagocytosis
and digest prey in food vacuoles
