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Level 2 Quiz
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1

The only invertebrates that have successfully invaded most of the land are which ones?
A)mollusks
B)insects
C)crustaceans
D)flatworms
2

Water enters a sponge through which part?
A)osculum
B)ostium
C)coelom
D)pinacocytes
3

Sponges do not have which feature?
A)specialized cells
B)gametes
C)supporting structures
D)organs
4

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

The gelatinous bell of a medusa is composed of which of these?
A)cnidocytes
B)mesoglea
C)spicules
D)gastrodermis
6

Drifting colonial polyps are called
A)siphonophores.
B)scyphozoans.
C)gorgonians.
D)cubozoans.
7

There is no medusa stage in the
A)Anthozoa.
B)Hydrozoa.
C)Scyphozoa.
D)Cubozoa.
8

Which group is free-living in the marine environment?
A)cestodes
B)turbellarians
C)trematodes
D)Hirudinea
9

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

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

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

Among mollusks, there is no radula among the
A)gastropods.
B)bivalves.
C)cephalopods.
D)chitons.
13

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

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

A carapace
A)covers the cephalothorax.
B)is segmented.
C)has two lateral valves.
D)is present in all Crustacea.
16

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

An important food source in polar ecosystems consists of
A)hermit crabs.
B)barnacles.
C)krill.
D)fish lice.
18

Decapods have
A)only one pair of antennae.
B)specialized feathery filtering appendages.
C)a large proboscis.
D)three pair of maxillipeds.
19

Females brood their eggs in a chamber in the
A)nudibranchs.
B)amphipods.
C)true crabs.
D)polychaetes.
20

Colonial zooids with a lophophore belong to the
A)Phoronida.
B)Anthozoa.
C)Bryozoa.
D)Brachiopoda.
21

Copepods might be caught by which worm-like planktonic group?
A)Chaetognatha
B)Oligochaeta
C)Pogonophora
D)Ctenophora
22

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

The mouth is directed upward in the
A)Asteroidea.
B)Crinoidea.
C)Holothuroidea.
D)Ophiuroidea.
24

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

Hemichordates and echinoderms may both have
A)a notochord.
B)a dorsal nerve cord.
C)similar larval stages.
D)a backbone.
26

An adult ascidian loses all chordate features but which of these?
A)tail
B)notochord
C)pharyngeal slits
D)dorsal hollow nerve cord
27

The Cephalochordata feed by
A)collecting particles among ciliated arms.
B)deposit feeding.
C)using the proboscis to stir up prey.
D)filter-feeding.





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