Zoology lecture 6- PROTOZOA 1 and 2 Questions With
Complete Solutions
When was the first evidence of life?
3.5 BYA
What were the first cell types?
prokaryotes
how did unicellular eukaryotes most likely form?
endosymbiosis
What does protozoan mean?
"First Animal"
WHat makes protozoans distinctly animal like?
1) no cell wall
2) at least 1 motile stage of life
3) most ingest their food (heterotrophs)
T/F Protozoans are completely contained inside one plasma
membrane?
T
What do all protozoans require?
Moisture
Important organelles:
Nucleus Description
, Membrane bound structure containing genetic materials (DNA)
and chromosomes
- nucleoli also often present
Important organelles:
Mitochonria
- used in energy acquisition using oxygen
- also contains DNA
Important organelles:
Hydrogenosomes def'n
substitutes where oxygen is absent
Important organelles:
Kinetoplasts def'n
derivatives of mitochondria in some phyla
- specialized mitochondria
- used in environs with low Oxygen
Important organelles:
Golgi apparatus
- part of secretory system
- parabasal bodies are structured with similar function in some
phyla
Important organelles:
Plastids
organelles containing photosynthetic pigments
- chloroplasts
- via ancestral engulfment of cyanobacteria
Complete Solutions
When was the first evidence of life?
3.5 BYA
What were the first cell types?
prokaryotes
how did unicellular eukaryotes most likely form?
endosymbiosis
What does protozoan mean?
"First Animal"
WHat makes protozoans distinctly animal like?
1) no cell wall
2) at least 1 motile stage of life
3) most ingest their food (heterotrophs)
T/F Protozoans are completely contained inside one plasma
membrane?
T
What do all protozoans require?
Moisture
Important organelles:
Nucleus Description
, Membrane bound structure containing genetic materials (DNA)
and chromosomes
- nucleoli also often present
Important organelles:
Mitochonria
- used in energy acquisition using oxygen
- also contains DNA
Important organelles:
Hydrogenosomes def'n
substitutes where oxygen is absent
Important organelles:
Kinetoplasts def'n
derivatives of mitochondria in some phyla
- specialized mitochondria
- used in environs with low Oxygen
Important organelles:
Golgi apparatus
- part of secretory system
- parabasal bodies are structured with similar function in some
phyla
Important organelles:
Plastids
organelles containing photosynthetic pigments
- chloroplasts
- via ancestral engulfment of cyanobacteria
