ZOOL 250 Final Exam Questions and Answers with Verified
Solutions | Latest 2026 Update
Q: Protista (6)
Answer:
KINGDOM
Unicellular & Eukaryotic Includes:
Flagellate
Sarcodine
Sporozoans
Ciliates
Q: Group "Flagellates" (Protista)
Answer:
Move via 1 or more flagella
Divided into phytoflagellates & zooflagellates
Q: Phytoflagellates (Protista
Answer:
Flagellates) - •Have chloroplasts
Examples: Dinoflagellates, Euglena, Volvox, Diatoms
Q: Zooflagellates (Protista
Answer:
Flagellates) - •Lack chloroplasts
Examples: Choanoflagellates, Trypanosoma, Giardia
Q: Group Sarcodines (Protista)
Answer:
Have pseudopodia, some with skeletons
Examples: Amoebas, Slime Molds, Foraminifera, Radiolarians
Q: Group Sporozoans (Protista)
Answer:
Apicomplexa
,Move in various ways
All are parasitic & most produce spored
Example: Plasmodium.
Q: Group Ciliates (Protista)
Answer:
Phylum Ciliphora
Move via cilia, complex forms, large variety
Examples: Parmecium & Stentor.
Q: 3 Methods of Heterotrophy in Protista
Answer:
Phagocytosis: Amoebas
Filtration: Choanoflagelates
Englulfing (swallowing whole): Cilliates
Q: How do multicellular animals differ from colonial protists? (5)
Answer:
Multicellular animal cells
Are not viable on their own
Exhibit differentiation
Are interdependent
Communicate & work together in a coordinated way
Form distinct body layers
Q: 3 Examples of Colonial Protists
Answer:
Volvox
Some Choanoflagellates
Slime Molds
Q: What are the similarities between collar cells of sponges & choanoflagellates?
(3)
Answer:
Flagellum with ring of microvilli
Flagellum with vane
,Diplosome: 2 basal bodies as anchor structure to flagella
Q: How many times has multicellularity arisen & in which groups?
Answer:
5 Times
Green Plants
Red Algae
Brown Algae
Fungi
0 0 Animals
Q: Key Traits of Metazoans (4)
Answer:
Fully Multicellular
Ability to move
Collagen: versatile glycoprotein that functions in many different animal tissues
Heterotrophy
Q: Porifera Anatomy (7)
Answer:
Not True Tissues (cellular level of organization)
No Mouth
No Gut
No Muscles
No Organs
No Circulatory System
No Clear Axis of Symmetry
Q: Defining Sponge Traits (3)
Answer:
Water Canal System
Mesohyl: massive mostly non cellular middle layer of spongin & spicules
Sister Group to Metazoa
Q: Types of Sponge Body Plans (3)
, Answer:
Ascon: single flagellated pumping cavity
Sycon: many flagellated canals radiate from spongocoel
Leucon: many flagellated chambers connect by passive canals
Sponge Body Type: Ascon
A- Osculum
B- Canal
C- Spongocoel
D- Ostia
E- Choanocyte Layer
F- Pinacoderm -
Sponge Body Type: Sycon
A- Osculum
B- Pinacoderm
C- Endopinacoderm
D- Choanocyte Layer
E- Spongocoel
F- Ostia
G- Repeat..
H- Mesohyl -
Sponge Body Type: Leucon
A- Osculum
B- Incurrent Canal
C- Outcurrent Canal
D- Flagellated Chamber
E- Mesohyl
F- Ostia
G- Spongocoel
H- Pinacoderm -
Q: Why are the ostia so much smaller than the osculum?
Answer:
To prevent large particles which cannot be digested from entering spongeocoel &
clogging up the flow
Solutions | Latest 2026 Update
Q: Protista (6)
Answer:
KINGDOM
Unicellular & Eukaryotic Includes:
Flagellate
Sarcodine
Sporozoans
Ciliates
Q: Group "Flagellates" (Protista)
Answer:
Move via 1 or more flagella
Divided into phytoflagellates & zooflagellates
Q: Phytoflagellates (Protista
Answer:
Flagellates) - •Have chloroplasts
Examples: Dinoflagellates, Euglena, Volvox, Diatoms
Q: Zooflagellates (Protista
Answer:
Flagellates) - •Lack chloroplasts
Examples: Choanoflagellates, Trypanosoma, Giardia
Q: Group Sarcodines (Protista)
Answer:
Have pseudopodia, some with skeletons
Examples: Amoebas, Slime Molds, Foraminifera, Radiolarians
Q: Group Sporozoans (Protista)
Answer:
Apicomplexa
,Move in various ways
All are parasitic & most produce spored
Example: Plasmodium.
Q: Group Ciliates (Protista)
Answer:
Phylum Ciliphora
Move via cilia, complex forms, large variety
Examples: Parmecium & Stentor.
Q: 3 Methods of Heterotrophy in Protista
Answer:
Phagocytosis: Amoebas
Filtration: Choanoflagelates
Englulfing (swallowing whole): Cilliates
Q: How do multicellular animals differ from colonial protists? (5)
Answer:
Multicellular animal cells
Are not viable on their own
Exhibit differentiation
Are interdependent
Communicate & work together in a coordinated way
Form distinct body layers
Q: 3 Examples of Colonial Protists
Answer:
Volvox
Some Choanoflagellates
Slime Molds
Q: What are the similarities between collar cells of sponges & choanoflagellates?
(3)
Answer:
Flagellum with ring of microvilli
Flagellum with vane
,Diplosome: 2 basal bodies as anchor structure to flagella
Q: How many times has multicellularity arisen & in which groups?
Answer:
5 Times
Green Plants
Red Algae
Brown Algae
Fungi
0 0 Animals
Q: Key Traits of Metazoans (4)
Answer:
Fully Multicellular
Ability to move
Collagen: versatile glycoprotein that functions in many different animal tissues
Heterotrophy
Q: Porifera Anatomy (7)
Answer:
Not True Tissues (cellular level of organization)
No Mouth
No Gut
No Muscles
No Organs
No Circulatory System
No Clear Axis of Symmetry
Q: Defining Sponge Traits (3)
Answer:
Water Canal System
Mesohyl: massive mostly non cellular middle layer of spongin & spicules
Sister Group to Metazoa
Q: Types of Sponge Body Plans (3)
, Answer:
Ascon: single flagellated pumping cavity
Sycon: many flagellated canals radiate from spongocoel
Leucon: many flagellated chambers connect by passive canals
Sponge Body Type: Ascon
A- Osculum
B- Canal
C- Spongocoel
D- Ostia
E- Choanocyte Layer
F- Pinacoderm -
Sponge Body Type: Sycon
A- Osculum
B- Pinacoderm
C- Endopinacoderm
D- Choanocyte Layer
E- Spongocoel
F- Ostia
G- Repeat..
H- Mesohyl -
Sponge Body Type: Leucon
A- Osculum
B- Incurrent Canal
C- Outcurrent Canal
D- Flagellated Chamber
E- Mesohyl
F- Ostia
G- Spongocoel
H- Pinacoderm -
Q: Why are the ostia so much smaller than the osculum?
Answer:
To prevent large particles which cannot be digested from entering spongeocoel &
clogging up the flow
