Quiz Ch. VII

Results Reporter
Out of 27 questions, you answered 27 correctly, for a final grade of 100%.
27 correct (100%)

0 incorrect (0%)

0 unanswered (0%)

Your Results:
The correct answer for each question is indicated by a .



1
CORRECT

The only invertebrates that have successfully invaded most of the land are which ones?



A)
mollusks



B)
insects



C)
crustaceans



D)
flatworms






2
CORRECT

Water enters a sponge through which part?



A)
osculum



B)
ostium



C)
coelom



D)
pinacocytes






3
CORRECT

Sponges do not have which feature?



A)
specialized cells



B)
gametes



C)
supporting structures



D)
organs






4
CORRECT

In an animal with radial symmetry,



A)
there is no head.



B)
the body plan is in five parts.



C)
there is no oral surface.



D)
there is an anterior end.






5
CORRECT

The gelatinous bell of a medusa is composed of which of these?



A)
cnidocytes



B)
mesoglea



C)
spicules



D)
gastrodermis






6
CORRECT

Drifting colonial polyps are called



A)
siphonophores.



B)
scyphozoans.



C)
gorgonians.



D)
cubozoans.






7
CORRECT

There is no medusa stage in the



A)
Anthozoa.



B)
Hydrozoa.



C)
Scyphozoa.



D)
Cubozoa.






8
CORRECT

Which group is free-living in the marine environment?



A)
cestodes



B)
turbellarians



C)
trematodes



D)
Hirudinea






9
CORRECT

Marine worms may gain support for the body from which of these means?



A)
an exoskeleton



B)
a protein skeleton



C)
a hydrostatic skeleton



D)
an endoskeleton






10
CORRECT

A polychaete worm can be told from a sipunculan, nemertean, or echiuran by its



A)
suckers.



B)
movable anterior portion.



C)
non-retractable proboscis.



D)
segmentation.






11
CORRECT

A closed circulatory system always has which of these features?



A)
blood within distinct vessels



B)
a heart with chambers



C)
open blood spaces



D)
the ability to take up nutrients from seawater






12
CORRECT

Among mollusks, there is no radula among the



A)
gastropods.



B)
bivalves.



C)
cephalopods.



D)
chitons.






13
CORRECT

Which feature of cephalopods is found in other mollusks?



A)
foot modified into arms and suckers



B)
complex nervous system



C)
closed circulatory system



D)
mantle






14
CORRECT

In a bivalve, the gills serve in



A)
gas exchange only.



B)
gas exchange and feeding.



C)
gas exchange and shell production.



D)
gas exchange and production of noxious chemicals.






15
CORRECT

A carapace



A)
covers the cephalothorax.



B)
is segmented.



C)
has two lateral valves.



D)
is present in all Crustacea.






16
CORRECT

Crustaceans generally reproduce by



A)
external fertilization.



B)
use of a modified arm to transfer a packet of sperm.



C)
direct sperm transfer.



D)
releasing gametes into the water.






17
CORRECT

An important food source in polar ecosystems consists of



A)
hermit crabs.



B)
barnacles.



C)
krill.



D)
fish lice.






18
CORRECT

Decapods have



A)
only one pair of antennae.



B)
specialized feathery filtering appendages.



C)
a large proboscis.



D)
three pair of maxillipeds.






19
CORRECT

Females brood their eggs in a chamber in the



A)
nudibranchs.



B)
amphipods.



C)
true crabs.



D)
polychaetes.






20
CORRECT

Colonial zooids with a lophophore belong to the



A)
Phoronida.



B)
Anthozoa.



C)
Bryozoa.



D)
Brachiopoda.






21
CORRECT

Copepods might be caught by which worm-like planktonic group?



A)
Chaetognatha



B)
Oligochaeta



C)
Pogonophora



D)
Ctenophora






22
CORRECT

In a starfish, an external part of the water-vascular system is



A)
the ring canal.



B)
Aristotle's lantern.



C)
an ampulla.



D)
a tube foot.






23
CORRECT

The mouth is directed upward in the



A)
Asteroidea.



B)
Crinoidea.



C)
Holothuroidea.



D)
Ophiuroidea.






24
CORRECT

The Holothuroidea usually feed



A)
on small particles.



B)
by using arms to catch plankton.



C)
by grazing on algae.



D)
by predation on clams.






25
CORRECT

Hemichordates and echinoderms may both have



A)
a notochord.



B)
a dorsal nerve cord.



C)
similar larval stages.



D)
a backbone.






26
CORRECT

An adult ascidian loses all chordate features but which of these?



A)
tail



B)
notochord



C)
pharyngeal slits



D)
dorsal hollow nerve cord






27
CORRECT

The Cephalochordata feed by



A)
collecting particles among ciliated arms.



B)
deposit feeding.



C)
using the proboscis to stir up prey.



D)
filter-feeding.