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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
scolex, opisthaptor
B
strobila, scolex
C
cercaria, strobila
D
opisthaptor, cercaria
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 parasites
B
in the intertidal zone
C
in deep sea vents
D
living as symbionts
3) the phylum Nemertea is general is most like members of the class
A
Monogenea
B
Cestoda
C
Turbellaria
D
Trematoda
4) The rhynchocoel is a cavity that contains the
A
proboscis
B
protonephridia
C
gonads
D
heart
5) While most members of the class Turbellaria are __ the nemerteans are ______
A
asexual, monoecious
B
hermaphroditic; asexual
C
monoecious, dioecious
D
dioecious, hermaphroditic
6) Approximately 80 species of the phylum Gnathostomulida have been found living
A
as symbionts
B
in the intertidal zone
C
in deep sea vents
D
as parasites
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
intermediate, complete
B
intermediate, definitive
C
molluscan, amphibian
D
indirect, direct
9) In flame cells
A
cili drive fluids through tubules for excretion
B
unidigested food is expelled
C
ciliated sperm are stored
D
light is detected
10) The large posterior attachment organ of the adult monogenean is the
A
rhabdite
B
pilidium
C
cirrus
D
opisthaptor
*select an answer for all questions
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