Name:     ID: 
 
Email: 

Ch. 29 Test B

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
The diversity of invertebrate phyla underwent its greatest increase
a.
before the Cambrian Period.
b.
during the Cambrian Period.
c.
after the Cambrian Period.
d.
both before and after the Cambrian Period.
 

 2. 
Which of the following invertebrates are deuterostomes?
a.
worms
c.
mollusks
b.
arthropods
d.
echinoderms
 

 3. 
In a protostome, the blastopore becomes a(an)
a.
mouth.
c.
zygote.
b.
anus.
d.
blastula.
 

 4. 
A body cavity that forms between the germ layers is called a(an)
a.
coelom.
c.
mesoderm.
b.
blastopore.
d.
ectoderm.
 

 5. 
Some type of body symmetry is found in all invertebrates EXCEPT
a.
cnidarians.
c.
sponges.
b.
mollusks.
d.
flatworms.
 

 6. 
During development, a zygote divides repeatedly to form a(an)
a.
endoderm.
c.
blastula.
b.
endoskeleton.
d.
germ layer.
 

 7. 
Invertebrates that break down their food through intracellular digestion include
a.
annelids.
c.
arthropods.
b.
mollusks.
d.
sponges.
 

 8. 
Which invertebrate has a gastrovascular cavity?
a.
arthropod
c.
cnidarian
b.
mollusk
d.
roundworm
 

 9. 
A true digestive tract is found in
a.
annelids.
c.
cnidarians.
b.
sponges.
d.
flatworms.
 

 10. 
Gases diffuse most efficiently across a respiratory membrane if the membrane is
a.
thick and dry.
c.
thick and moist.
b.
thin and dry.
d.
thin and moist.
 

 11. 
In insects, gas exchange takes place through a network of
a.
tracheal tubes.
c.
book lungs.
b.
mantle cavities.
d.
blood vessels.
 

 12. 
In an open circulatory system, blood
a.
never leaves the heart.
b.
does not come in direct contact with the tissues.
c.
is always contained within a system of blood vessels.
d.
is pumped through a system of sinuses.
 

 13. 
An example of an animal with an open circulatory system is a(an)
a.
sponge.
c.
arthropod.
b.
cnidarian.
d.
annelid.
 

 14. 
Which of the following is a function of an excretory system?
a.
eliminating nitrogenous wastes from the body
b.
exchanging oxygen and carbon dioxide with the environment
c.
gathering and processing information from the environment
d.
obtaining and digesting food
 

 15. 
The eyespots of flatworms can
a.
detect the presence of light.
c.
detect color.
b.
detect motion.
d.
form images.
 

Completion
Complete each statement using the following terms:

nerve nets       trace       cephalization       pseudocoelom
 

 16. 
____________________ fossils are tracks and burrows made by soft-bodied animals whose bodies were not fossilized.
 

 

 17. 
A body cavity lined partially with mesoderm is called a(an) ____________________.
 

 

 18. 
The concentration of sense organs and nerve cells in the front of the body is called ____________________.
 

 

 19. 
In Figure 29-1, the structure labeled X is called a(an) ____________________.

co019-1.jpg

Figure 29–1
 

 

 20. 
The simplest nervous systems are called ____________________.
 

 



 
         Start Over