Chapter 29:
Echinoderms and Invertebrate Chordates
1.
What is the difference between the larval stage and the adult stage of an echinoderm?
a.
The larval stage has bilateral symmetry and the adult has radial symmetry.
b.
Echinoderms in the larval stage are predators; the adults are herbivores.
c.
Echinoderms in the larval stage have eyespots; the adults have only light-sensitive cells.
d.
Echinoderms in the larval stage have no brains and have brains.
Hint
2.
Which of these is a sea cucumber?
a.
b.
c.
d.
Hint
3.
Which of these compounds is part of an echinoderm's endoskeleton?
a.
calcium carbonate
b.
hydrogen peroxide
c.
sodium chloride
d.
carbon dioxide
Hint
4.
Sea stars are the only echinoderm with __________.
a.
asymmetry
b.
pedicellariae
c.
endoskeletons
d.
an eyespot
Hint
5.
What is the difference between vertebrate chordates and invertebrate chordates?
a.
All vertebrate chordates develop a backbone but invertebrate chordates do not.
b.
All vertebrate chordates are filter feeders; invertebrate chordates are predators.
c.
All vertebrate chordates are sessile and all invertebrate chordates are free-living.
d.
All vertebrate chordates reproduce asexually; vertebrates reproduce by parthenogenesis.
Hint
6.
Which of these features is NOT a characteristic of a chordate?
a.
a postanal tail
b.
an asymmetric body plan
c.
a notochord
d.
a dorsal hollow nerve cord
Hint
7.
While some species have more than 40, most sea stars have 5 __________.
a.
tube feet
b.
rays
c.
tails
d.
madreporites
Hint
8.
Chordate embryos have __________.
a.
a notochord
b.
pedicellariae
c.
an eyespot
d.
tube feet
Hint
9.
Which of these is NOT a chordate?
a.
lancet
b.
tuna
c.
sea squirt
d.
sand dollar
Hint
10.
How do lancets feed themselves?
a.
They are scavengers.
b.
They are parasites.
c.
They are filter feeders.
d.
They are predators.
Hint
11.
__________ is the opening for the water vascular system.
a.
The eyespot
b.
The pharynx
c.
The spines
d.
The madreporite
Hint
12.
Which structure shown is the only indicator that tunicates are chordates?
a.
mouth
b.
anus
c.
reproductive organs
d.
gill slits
Hint
13.
Which of these animals is classified differently than the others?
a.
sea daisies
b.
sea lilies
c.
sea squirts
d.
sea urchins
Hint
14.
Which sea star organ is responsible for the elimination of body wastes?
a.
the anus
b.
the pharynx
c.
the chelicerae
d.
the endoskeleton
Hint
15.
A sea star uses its __________ for protection from predators.
a.
anus
b.
pedicellariae
c.
madreporites
d.
eyespots
Hint
