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Acoelomate Animals Part 3
Test Description: Phyla platyhelminthes, nemertea, and gnathostomulida
Instructions: Answer all questions to get your test result.
1) The chain of proglottids is collectively called the ____and the holdfast or attachment organ is called the ___
A
opisthaptor, cercaria
B
cercaria, strobila
C
strobila, scolex
D
scolex, opisthaptor
2) While a few of the approximately 650 species of the phylum Nemertea live in moist soil or fresh water, most of them are found
A
living as symbionts
B
in the intertidal zone
C
in deep sea vents
D
living as parasites
3) the phylum Nemertea is general is most like members of the class
A
Turbellaria
B
Monogenea
C
Trematoda
D
Cestoda
4) The rhynchocoel is a cavity that contains the
A
protonephridia
B
gonads
C
proboscis
D
heart
5) While most members of the class Turbellaria are __ the nemerteans are ______
A
monoecious, dioecious
B
asexual, monoecious
C
dioecious, hermaphroditic
D
hermaphroditic; asexual
6) Approximately 80 species of the phylum Gnathostomulida have been found living
A
as symbionts
B
in the intertidal zone
C
as parasites
D
in deep sea vents
7) The members of the phylum Gnathostomulida are similar to rotifers because they both have
A
a pseudocoel
B
a closed circulatory system
C
a complete gut
D
lateral armed jaws
8) In the digenetic trematodes, the first or invertebrate host is called the ____ and the second or final host is called the ___
A
indirect, direct
B
molluscan, amphibian
C
intermediate, definitive
D
intermediate, complete
9) In flame cells
A
light is detected
B
unidigested food is expelled
C
ciliated sperm are stored
D
cili drive fluids through tubules for excretion
10) The large posterior attachment organ of the adult monogenean is the
A
opisthaptor
B
rhabdite
C
cirrus
D
pilidium
*select an answer for all questions
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