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Practice Exam 3
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26. What is developmental biology?
a) The study of processes from a single cell to a
multicellular organism
b) The study of how organisms are constructed
c) The study of embryonic growth
d) The study of developmental mutations
*e) All of the above
28. The fate of the blastopore distinguishes between
Protostomes in which it becomes the___________, and
Deuterostomes in which it becomes the___________.
a) mouth, coelom
b) anus, mouth
c) coelom, archenteron
*d) mouth, anus
e) none of the above
29. At which developmental stage should one be able to
first distinguish a protostome embryo from a
deuterostome embryo?
a) cleavage
b) metamorphosis
*c) gastrulation
d) fertilization
e) coelom formation
31. Which of the following is a characteristic found only
in animals?
a) Multicellular
b) Cell walls of cellulose
c) Absorptive nutrition
*d) proteins hold cells together
e) Heterotrophic
32. All animals with _________ have some type of
coelom.
a) radial symmetry
b) two germ layers
*c) bilateral symmetry
d) true tissues
e) eyes
Stephanie
Biology 211
Roe
Feb 25, 2013
34. What is the function of a coelom?
*a) The fluid-filled cavity cushions and protects the
organs.
b) It is a place for muscle attachment.
c) It is where digestion occurs.
d) It is where fertilization occurs.
e) All of the above are correct
37. Pseudocoelomates are animals that _____.
a) do not have a brain
b) do not have mesoderm tissue
c) have protostome development
*d) have a coelom that is not completely lined with
mesoderm
e) have a solid body without a cavity
40. _________ is a process that rearranges the
developing embryo to form germ layers.
*a) Gastrulation
b) Cleavage
c) Mitosis
d) Blastulation
e) Blastopore
41. __________ is an important developmental process,
when a single-cell zygote undergoes mitotic cell division
to become multicellular.
a) Fertilization
b) Gastrulation
*c) Cleavage
d) Meiosis
e) Blastulation
43. The Porifera have choanocytes, a unique cell type in
Kingdom Animalia. Which protist is structurally similar
to choanocytes?
a) dinoflagellates
*b) choanoflagellates
c) apicomplexans
d) euglena
e) diatoms
44. The common ancestor of all animals was probably a
______.
a) bacterium
b) Archea
c) fungus
*d) protist
e) Bryophyte
47. You are trying to identify an organism. It is an
animal, but it does not have nerve or muscle tissue. It is
neither diploblastic nor triploblastic. It is probably a __.
a) comb jelly
*b) sponge
c) flatworm
d) nematode
e) jellyfish
*c) Corals
d) Porifera
50. The characteristic of Cnidaria that distinguishes it
from all other animal phyla is ____.
a) a gastrovascular cavity
b) three germ layers
c) true tissues
*d) radial symmetry
e) hydrostatic skeleton
48. In Cnidaria, ______ are colonial polyps that secrete a
calcium carbonate skeleton that create large
ecologically-important structures and are found in
shallow seas.
a) sea anemones
b) Portaguese man-of-war
e) Platyhelminthes
57. Platyhelminthes differ from cnidarians in that
platyhelminthes have ____, which is not found in
cnidarians.
a) an anus that develops from the blastopore
*b) three germ layers
c) true tissues
d) radial symmetry
e) a true coelom
51. All of the following are characteristics of the phylum
Cnidaria except ___.
a) a gastrovascular cavity
b) a polyp stage
c) a medusa stage
d) cnidocytes
*e) a pseudocoelom
59. In animals, bilateral symmetry is correlated with
_____.
a) an ability to attach to a host organism
b) the presence of a skeleton
c) adaptation to terrestrial environments
*d) cephalization
e) an ability to swim
52. The ______ is a cell type found only in Cnidaria and
is used to capture prey.
a) blastocyst
*b) cnidocyte
c) osculum
d) choanocyte
e) amoebocyte
60. In a parasitic life cycle, sexual reproduction occurs
___ .
a) in the intermediate host
b) outside of the host’s body
*c) in final/terminal host
d) None are true; parasites do not reproduce sexually
e) Both A and B are correct
54. The ______ is a cell type found only in Porifera and
is used to engulf food particles by phagocytosis.
a) blastocyst
b) cnidocyte
c) osculum
*d) choanocyte
e) amoebocyte
55. A ___________ is used for digestion, but has only a
single opening.
*a) gastrovascular cavity
b) intestine
c) gut
d) pharynx
e) B and C are correct
61. Generally speaking, members of which class(es) of
flatworms are not parasites?
*a) Turbellaria
b) Trematoda
c) Cestoda
d) Monongena
e) both a & b
63. Which of the following statements about tapeworm
feeding is correct?
a) they have complete digestive tracts
b) they ingest food with their mouths
c) As adults they live and feed in their hosts blood
stream
d) They are autotrophic
*e) They absorb nutrients through their body wall
66. In parasitic platyhelminthes, most of the body cavity
is filled with______.
a) gastrovascular cavity
*b) reproductive organs
c) sensory organs
d) a pharynx
e) segmentation
73. Molluscs do not have a single common body plan.
Despite this, all mollusks have which of the following?
a) a beak
b) fins
*c) a foot
d) a radula
e) Both C and D
74. Gastropods, bivalves and cephalopods all have a
_______ that secretes the shell.
a) foot
*b) mantle
c) gill
d) visceral mass
e) chromophore
76. Molluscs differ from nematodes in that mollusks
have _____, which is not found in nematodes.
a) bilateral symmetry
b) three germ layers
c) an anus that develops from the blastopore
d) true tissues
*e) a body cavity completely lined with mesoderm tissue
78. Which of the following is not a trait of cephalopods?
a) modified foot used to grasp prey
b) closed circulatory system
*c) gastrovascular cavity
d) beak to tear prey
e) mantle
81. In Iowa, freshwater bivalves have a parasitic larval
stage. How is parasitism used by this group of
organisms?
*a) The larvae are dispersed by fish hosts
b) The larvae feed on the blood of their hosts
c) The larvae reproduce sexually on their hosts
d) The larvae reproduce asexually on their hosts
e) The larvae need fish as an intermediate host before
moving to a final host
82. The animal phylum ________ has a true coelom,
complete digestive track and segmentation.
*a) Annelida
b) Platyhelminthes
c) Nematoda
d) Mollusca
e) Arthropoda
83. Annelids are characterized by all of the following
except ____.
a) a hydrostatic skeleton
b) segmentation
c) a complete digestive system
d) some parasitic species
*e) a cuticle made of chitin
87. Which of the following annelid classed produce a
blood anti-coagulent ?
a) Oligochaeta
b) Polychaeta
*c) Hirudinea
d) all three
e) Both b and c
89. Which of the following is NOT a characteristic of all
Ecdysozoa?
a) protostomes
b) ability to molt periodically when growing
*c) jointed appendages
d) bilaterally symmetric
e) exoskeletons
90. Which group contains both ecdysozoans and
lophotrochozoans?
a) Deuterostomes
*b) Protostomes
c) Arthropoda
d) Chordata
e) Both A and D are correct
93. What function is shared between an exoskeleton and
an endoskeleton?
*a) a site for muscle attachment
b) prevents water-loss
c) provides protection
d) important for respiration
e) requires periodic shedding for organismal growth
96. Which of the following is false about Nematodes?
a) Nematodes play an important role in decomposition.
b) Nematodes have a pseudocoelom.
c) Nematodes have a complete digestive system.
d) Some nematode species are parasites.
*e) None of the above; all are true
97. Which of the following characteristics do nematodes
share with fungi?
*a) Both play an important role in decomposition.
b) Both have cell walls.
c) Both have structures made of chitin
d) Both A and B are correct
e) Both B and C are correct
138. _________ are acoelomate protostomes that are
flattened dorsoventrally.
a) Mollusca
b) Annelida
*c) Platyhelminthes
d) Nematoda
e) Echinodermata
99. Which of the following are characteristics of
arthropods?
I. protostome development
II. bilateral symmetry
III. a pseudocoelom
IV. three embryonic germ layers
V. a closed circulatory system
140. The animal phylum ________ are
pseudocoelomates, have complete digestive tract and
molt.
a) Annelida
b) Platyhelminthes
*c) Nematoda
d) Mollusca
e) Arthropoda
a) I, II
*b) I, II, IV
c) II, III
d) II, III, V
e) III, IV, V
101. The most successful group (contains the greatest
number of species) in the Arthropoda is __.
a) Chelicerata
b) Myriapoda
*c) Hexapoda
d) Crustacea
e) Cephalopoda
103. Among arthropods, only ________ possess
specialized mouthparts that were a major adaptation for
their radiation and diversification.
a) Myriapoda
b) Chelicerata
c) Gastropoda
*d) Hexapoda
e) Crustacea
142. Which of the following descriptions is incorrect
a) Echinodermata – bilateral symmetry as larvae, coelom
present
b) Nematoda – roundworms, pseudocoelomate
c) Cnidaria – radial symmetry, polyp and medusa body
forms
d) Platyhelminthes – flatworms, gastrovascular cavity,
acoelomate
*e) Annelida – segmented worms, gastrovascular cavity,
coelom present
144. Which molluscan class includes snails?
a) Turbellaria
b) Bivalvia
*c) Gastropoda
d) Cephalopoda
e) None of the above; snails are not molluscs
145. Which of the following pairs are incorrect?
a) cephalo = head
b) gastro = stomach
c) poda = foot
*d) bi = divided
e) valvia = shell
136. Earthworms (Phylum Annelida) are ecologically
important because they:
a) Recycle organic matter by eating it.
b) Produce mineral-rich casts.
c) Aerate the soil when making tunnels.
d) Both A and C
*e) All statements are true.
146. Which of the following pairs are incorrect?
*a) meso = inside
b) gastro = stomach
c) poda = foot
d) arthro = jointed
e) coel = cavity
137. Which phylum is diploblastic?
*a) Cnidaria
b) Nematoda
c) Platyhelminthes
d) Poriferia
e) Echinodermata
147. Which of the following pairs are incorrect?
*a) ecto = layer
b) gastro = stomach
c) poda = foot
d) meso = middle
e) coel = cavity
67. Using the life cycle of the liver fluke, please answer the following question.
Which is the final/terminal host?
a) snail
b) cow
c) sheep
d) human
*e) B, C, and D are all final hosts