Name ______________________________ Class___________________Date__________________
Assessment
Chapter Test B
Invertebrates
USING KEY TERMS
Use the terms from the following list to complete the sentences below. Each term
may be used only once. Some terms may not be used.
cephalothorax
cephalopods
eyes
sensory lobes
bristles
neurons
gastropods
metamorphosis
1. A spider’s two main body parts consist of an abdomen and a(n)
______________________.
2. A phase in the life of many insects, ______________________ is a rapid
change from an immature form to an adult form
3. The class of mollusks that use a radula is known as the
______________________
4. The bumps on a flatworm’s head that help it to find food are its
______________________
5. Thought to be among the smartest invertebrates,______________________
have large brains
6. All animals except sponges have special tissues known as
______________________ to help sense their environment
UNDERSTANDING KEY IDEAS
Write the letter of the correct answer in the space provided.
_____ 7. The word arthropod means
a. “large brain.”
b. “jointed foot.”
c. “spiny skin.”
d. “paralyzing toxin.”
_____ 8. The organs of many invertebrates are contained in a body cavity called
the
a. coelom.
c. visceral mass.
b. gut.
d. chelicerae.
_____ 9. Why are marine worms called polychaetes?
a. They live in the ocean.
b. They have many segments.
c. They have many legs.
d. They have many bristles.
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Invertebrates
Name ______________________________ Class___________________Date__________________
Chapter Test B continued
_____ 10. What does a sponge use to digest food particles?
a. gut
b. collar cells
c. osculum
d. thorax
11. List the four distinguishing characteristics of arthropods
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
12. When a piece of a sponge breaks off, what happens?
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
13. What are the three major classes of flatworms?
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
14. Explain the difference between the way a fluke gets food and the way a marine
worm gets food
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
15. Name one characteristic that makes annelid worms different from flatworms
_______________________________________________________________
_______________________________________________________________
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Invertebrates
Name ______________________________ Class___________________Date__________________
Chapter Test B continued
CRITICAL THINKING
16. About one million invertebrate species have been named. Scientists think there
may be millions more yet to be classified. Many species have survived for
millions of years. Why do you think invertebrates have been so successful?
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
17. Many invertebrates are very helpful to people and to the environment. Yet,
some are harmful. A parasite such as a leech can suck a person’s blood.
Should people try to eliminate leeches to protect themselves? Explain your
answer
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
18. As a person, you have a backbone and do not go through metamorphosis.
Those are some ways you are different from an ant. Can you name ways in
which you are similar to an ant?
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
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Invertebrates
Name ______________________________ Class___________________Date__________________
Chapter Test B continued
CONCEPT MAPPING
19. Use the following terms to complete the concept map below:
invertebrates
bilateral symmetry
endoskeleton
radial symmetry
exoskeleton
cnidarians
echinoderms
stinging cells
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Invertebrates