ZOOL 250 Lab 2: Protists and Porifera Exam Questions and
Answers with Verified Solutions | Latest 2026 Update
Q: Protists
Answer:
An artificial array of single-cells or colonial eukaryote organisms.
Q: Porifera
Answer:
Sponges. One of the most primitive forms of living multicellular organisms.
Q: Choanocytes
Answer:
Specialized filtering/pumping cells in porifera that help them move water through
their bodies and feed.
Q: Mesohyl
Answer:
The skeletal support system in sponges. Includes spicules and sometimes spongin.
Q: Ostia
Answer:
Incurrent openings in sponges.
Q: Oscula
Answer:
Excurrent openings in sponges.
Q: Numerical Aperture
Answer:
The product of the refractive index of the medium between the front lens of the
objective and the object being examines and the sine of half the angle formed by
the rays of the light entering the front lens from a point on the object. Helps to
determine resolving power of a microscope.
Q: Phytoflagellates
, Answer:
Plant flagellates. Group of convenience for protists. Includes phylums
Dinoflagellata, Euglenida, and Chlorophyta.
Q: Zooflagellates
Answer:
Animal flagellates. Group of convenience for protists. Includes phylums
Kinetoplastida and Diplomonadida.
Q: Sarcodines
Answer:
Amoeboid protozoans. Use pseudopodia for locomotion and feeding. Group of
convenience for protists. Includes phylums Amoebozoa and Granuloreticulosa.
Q: Sporozoans
Answer:
Spore-formers. Group of convenience for protists. Includes phylum Apicomplexa.
Q: Ciliata
Answer:
Group of convenience for protists. Includes phylum Ciliophora.
Q: Euglenida
Answer:
Phylum of protists. Euglenids are among the best known and commonest
phytoflagellates in freshwater.
Q: Chlorophyta
Answer:
Phylum of protists in phytoflagellate group. They are colonial protozoans whose
colony organization closely resembles that of multicellular organisms.
Q: Dinoflagellata
Answer:
Phylum of protists in the phytoflagellate group. Common in the salt and fresh
water. Some marine species are toxic and some are bioluminescent.
Answers with Verified Solutions | Latest 2026 Update
Q: Protists
Answer:
An artificial array of single-cells or colonial eukaryote organisms.
Q: Porifera
Answer:
Sponges. One of the most primitive forms of living multicellular organisms.
Q: Choanocytes
Answer:
Specialized filtering/pumping cells in porifera that help them move water through
their bodies and feed.
Q: Mesohyl
Answer:
The skeletal support system in sponges. Includes spicules and sometimes spongin.
Q: Ostia
Answer:
Incurrent openings in sponges.
Q: Oscula
Answer:
Excurrent openings in sponges.
Q: Numerical Aperture
Answer:
The product of the refractive index of the medium between the front lens of the
objective and the object being examines and the sine of half the angle formed by
the rays of the light entering the front lens from a point on the object. Helps to
determine resolving power of a microscope.
Q: Phytoflagellates
, Answer:
Plant flagellates. Group of convenience for protists. Includes phylums
Dinoflagellata, Euglenida, and Chlorophyta.
Q: Zooflagellates
Answer:
Animal flagellates. Group of convenience for protists. Includes phylums
Kinetoplastida and Diplomonadida.
Q: Sarcodines
Answer:
Amoeboid protozoans. Use pseudopodia for locomotion and feeding. Group of
convenience for protists. Includes phylums Amoebozoa and Granuloreticulosa.
Q: Sporozoans
Answer:
Spore-formers. Group of convenience for protists. Includes phylum Apicomplexa.
Q: Ciliata
Answer:
Group of convenience for protists. Includes phylum Ciliophora.
Q: Euglenida
Answer:
Phylum of protists. Euglenids are among the best known and commonest
phytoflagellates in freshwater.
Q: Chlorophyta
Answer:
Phylum of protists in phytoflagellate group. They are colonial protozoans whose
colony organization closely resembles that of multicellular organisms.
Q: Dinoflagellata
Answer:
Phylum of protists in the phytoflagellate group. Common in the salt and fresh
water. Some marine species are toxic and some are bioluminescent.
