Chapter 29:
Echinoderms and Invertebrate Chordates
Practice Test
1.
Which of these echinoderms evolved most recently?
a.
sea urchins
b.
sea stars
c.
brittle stars
d.
sea cucumbers
Hint
2.
The close relationship between echinoderms and chordates is indicated by their deuterostome development and __________ of their larvae.
a.
notochords
b.
rays
c.
tube feet
d.
bilateral symmetry
Hint
3.
In seastars, thin-walled tubes that have a suction cup on one end are called ________.
a.
tube feet
b.
ampullae
c.
pedicellarias
d.
spines
Hint
4.
All adult echinoderms have __________.
a.
bilateral symmetry
b.
notochords
c.
dorsal nerve cords
d.
radial symmetry
Hint
5.
When moving, a sea star curves up the tips of its rays to detect _______.
a.
prey
b.
light
c.
sound
d.
chemicals in the water
Hint
6.
There is a good fossil record of echinoderms because they have __________ that easily fossilize.
a.
exoskeletons
b.
spines
c.
endoskeletons
d.
tube feet
Hint
7.
By comparing the development of echinoderms and chordates, scientists can determine the animals` __________.
a.
phylogeny
b.
methods of defense
c.
feeding methods
d.
response to stimuli
Hint
8.
The tube feet on sand dollars are modified for __________.
a.
excretion and breathing
b.
digestion
c.
sensing the environment
d.
capturing food and breathing
Hint
9.
A muscular structure that operates tube feet is called the __________.
a.
madreporite
b.
ampulla
c.
pedicellaria
d.
ray
Hint
10.
Brittle stars use their tube feet for __________.
a.
locomotion
b.
reproduction
c.
moving particles of food into the mouth in the central disk
d.
protection from predators
Hint
11.
Sea urchin spines __________.
a.
sense the amount of light in the water
b.
help capture prey
c.
aid in protection, locomotion and burrowing
d.
are involved in reproduction
Hint
12.
The only sessile echinoderm is a __________.
a.
sea cucumber
b.
sand dollar
c.
sea lily
d.
brittle star
Hint
13.
The ability of brittle stars to regenerate enables them to survive __________.
a.
low tides
b.
changes in temperature
c.
predators
d.
high tides
Hint
14.
Humans are more closely related to invertebrate chordates than to echinoderms because they both have __________.
a.
five senses
b.
gill slits and tails
c.
a notochord, gill slits, muscle blocks and a dorsal nerve cord
d.
a notochord, gill slits, muscle blocks and a ventral nerve cord
Hint
15.
An invertebrate chordate that is a sessile filter feeder is a __________.
a.
sea squirt
b.
sea cucumber
c.
lancelet
d.
sea lily
Hint
