Bio 204 Lab #3
1. What groups of "basal" eukaryotes lack mitochondria? What are two impor-
tant members of these?: Diplomonads
-Giardia Lamblia (intestinal parasite)
Parabasalids
-Trichomonas (sexually transmitted disease)
2. What organelle arose via endosymbiosis in the photosynthetic eukaryotes?
What is the evidence?: Chloroplast
->Similar to bacteria....
-Have their own single-stranded, circular DNA
-Smaller sized 70s ribosome
-Replicate by binary fission
3. What four features are used to distinguish the groups of photosynthetic
eukaryotes?: -Type of photosynthetic pigments
-Cell wall compounds
1/4
, -Type of motile cells
-Storage compounds
4. Define pseudopodia, amoeboid movement, contractile vacuole, and phago-
cytosis: Pseudopodia: thin extensions of the cytoplasm (tool for movement)
Amoeboid movement: type of locomotion
Contractile vacuole: a special organelle in amoeboid cells
-Fills with water and then bursts, pushing water out of the celle
-Constantly bails excess water out to allow the cell to live in freshwater without bursting from osmotic pressure
Phagocytosis: obtaining energy by engulfing and then breaking down food particles
5. What are the major features of the Euglenids?: -Unicellular eukaryotes
-chlorophyll a & b
-no cell wall
-Layer of protein called pellicle
-flagella (cilia) - 2 or more
2/4
1. What groups of "basal" eukaryotes lack mitochondria? What are two impor-
tant members of these?: Diplomonads
-Giardia Lamblia (intestinal parasite)
Parabasalids
-Trichomonas (sexually transmitted disease)
2. What organelle arose via endosymbiosis in the photosynthetic eukaryotes?
What is the evidence?: Chloroplast
->Similar to bacteria....
-Have their own single-stranded, circular DNA
-Smaller sized 70s ribosome
-Replicate by binary fission
3. What four features are used to distinguish the groups of photosynthetic
eukaryotes?: -Type of photosynthetic pigments
-Cell wall compounds
1/4
, -Type of motile cells
-Storage compounds
4. Define pseudopodia, amoeboid movement, contractile vacuole, and phago-
cytosis: Pseudopodia: thin extensions of the cytoplasm (tool for movement)
Amoeboid movement: type of locomotion
Contractile vacuole: a special organelle in amoeboid cells
-Fills with water and then bursts, pushing water out of the celle
-Constantly bails excess water out to allow the cell to live in freshwater without bursting from osmotic pressure
Phagocytosis: obtaining energy by engulfing and then breaking down food particles
5. What are the major features of the Euglenids?: -Unicellular eukaryotes
-chlorophyll a & b
-no cell wall
-Layer of protein called pellicle
-flagella (cilia) - 2 or more
2/4
