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Post-Test
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1
Which of the following sponge structures functions as a sieve for small particles and organisms found in water as it is entering through pores?
A)Spongocoel
B)Choanocytes
C)Ostium
D)Osculum
E)Spicules
2
The internal body cavity of mature Radiata is most accurately referred to as the
A)endocoel.
B)pharyngeal chamber.
C)gastrovascular cavity.
D)radiocoel.
E)blastula.
3
Which one of the following would not be a member of the group Lophotrochozoa?
A)Segmented worms
B)Sea urchins
C)Mollusks
D)Rotifers
E)Flatworms
4
Nearly all ctenophores exhibit
A)radial symmetry.
B)a polyp stage.
C)eight rows of flagella on their surface.
D)bioluminescence.
E)stinging cells on their tentacles.
5
True or False: Echinoderms are invertebrate animals but share a clade with vertebrates called Deuterostomia.
A)True
B)False
6
Approximately what percentage of the species of animals on Earth is believed to be invertebrate?
A)1%
B)5%
C)25%
D)50%
E)95%
7
Photosensitive organs in cnidarians are referred to as _____________, and stinging cells are referred to as ___________.
A)nematocysts; statocysts
B)cnidocils; cnidocytes
C)statocysts; ocelli
D)ocelli; cnidocytes
E)ocelli; statocysts
8
True or False: Cnidarians express both haploid and diploid stages in their life cycles.
A)True
B)False
9
Match the class of Platyhelminthes on the left with the appropriate typical characteristic on the right.
i. Trematodaa. nutrient absorption across epidermis
ii. Monogeneab. mostly marine, predatory or scavenger
iii. Cestodac. complex life cycle with intermediate several intermediate hosts
iv. Turbellariad. simple life cycle with no intermediate hosts.
A)i = b; ii = a; iii = c; iv = d
B)i = a; ii = d; iii = b; iv = c
C)i = c; ii = d; iii = a; iv = b
D)i = d; ii = a; iii = c; iv = b
E)i = d; ii = c; iii = a; iv = b
10
Which one of the following most accurately describes parthenogenesis in rotifers?
A)Production of both sperm and egg
B)Ability to reproduce either sexually or asexually
C)Development of a female from an unfertilized diploid egg
D)Ability to self-fertilize
E)None of the choices accurately describe parthenogenesis.
11
Which of the following phyla is part of the group referred to as Lophophorates?
A)Bryozoa
B)Brachiopoda
C)Phoronida
D)Brachiopoda and Phoronida
E)Bryozoa, Brachiopoda, and Phoronida
12
True or False: Molluscs utilize an open circulatory system that circulates hemolymph fluid through tissues.
A)True
B)False
13
Match the class of Mollusk on the left with the representative example on the right.
i. Bivalviaa. chitons
ii. Polyplacophoriab. snails
iii. Cephalopodac. clams
iv. Gastropodad. squid
A)i = c; ii = d; iii = a; iv = b
B)i = b; ii = c; iii = d; iv = a
C)i = c; ii = a; iii = d; iv = b
D)i = a; ii = d; iii = b; iv = c
E)i = d; ii = c; iii = a; iv = b
14
Which of the following statements about earthworms is correct?
A)Each segment in an earthworm has setae on its exterior surface.
B)Muscle contractions in one segment distort the entire body during movement.
C)Earthworms have a fairly well-developed head and typically display parapodia.
D)Their circulatory system is closed and consists of a single pumping vessel that serves as a heart.
E)All of the statements about earthworms are correct.
15
The cuticle of a nematode is composed primarily of
A)chitin.
B)actin.
C)cellulose.
D)keratin.
E)collagen.
16
Arthropods share a clade with which of the following?
A)Chordates
B)Lophotrochozoa
C)Ctenophora
D)Echinodermata
E)Nematoda
17
Crustaceans often display abdominal appendages in addition to walking legs that are most accurately referred to as
A)spinnerets.
B)swimmerets.
C)maxillipeds.
D)probosci.
E)pedipalps.
18
All echinoderms express
A)bilateral symmetry.
B)bioluminescence.
C)radial symmetry.
D)cephalization during development.
E)exoskeletons.
19
Which of the following traits is characteristic of chordates?
A)Pharyngeal slits
B)Dorsal hollow nerve cord
C)Postanal tail
D)Notochord
E)All of the choices are traits characteristic of chordates.
20
True or False: Tunicates, lancelets, and sea cucumbers are all invertebrate chordates.
A)True
B)False





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