Biology: The Dynamics of Life, California Edition

Chapter 26: Sponges, Cnidarians, Flatworms, and Roundworms

Sponges, Cnidarians, Flatworms, and Roundworms

1.
Most sponges reproduce sexually and are __________.
A)vertebrates
B)hermaphrodites
C)bilaterally symmetrical
D)predators
2.
Which of these organisms is NOT a cnidarian?
A)sea anemones
B)jellyfishes
C)corals
D)sponges
3.
Which of these phyla do roundworms belong to?
A)nematodes
B)cnidarians
C)platyhelminthes
D)poriferates
4.
Which of these statements is true?
A)All sponges are invertebrates.
B)All sponges are found in freshwater environments.
C)All sponges are parasites.
D)All sponges reproduce asexually.
5.
In what way are roundworms different from flatworms?
A)Roundworms have no free-living species and flatworms do.
B)Roundworms do not have eyespots and flatworms do.
C)Roundworms have two body openings and flatworms do not.
D)Roundworms are parasitic and flatworms are predators.
6.
A sponge expels wastes through its __________.
A)spicules
B)collar cells
C)osculum
D)pore cells
7.
Eating infected pork products can cause __________.
A)trichinosis
B)schistosomiasis
C)nematodes
D)hermaphrodites
8.
Planarians are able to replace missing body parts through __________.
A)regeneration
B)trichinosis
C)nerve nets
D)nematocysts
9.
__________ are used by cnidarians to poison their prey.
A)Ganglia
B)Polyps
C)Nematocysts
D)Spicules
10.
Which animal is responsible for passing the disease schistosomiasis to humans?
A)planarians
B)nematodes
C)tapeworms
D)blood flukes
11.
Which planarian body part takes food into its digestive system?
A)the flame cell
B)the cilia
C)the head
D)the pharynx
12.
Where are most of a planarian's nervous system organs located?
A)in the muscles
B)in the lungs
C)in the tail
D)in the head
13.
Which of these classes do sea anemones belong to?
A)Cubozoans
B)Hydrozoans
C)Scyphozoans
D)Anthozoans
14.
__________ are one way sponges protect themselves from predators.
A)Vocalizations
B)Fins
C)Teeth
D)Chemicals
15.
Why do parasitic flatworms have hooks in their mouths?
A)to reproduce through regeneration.
B)to filter feed more easily.
C)to attach to a ganglion.
D)to anchor to the host.
16.
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What cnidarian body form is shown in this illustration?
A)medusa
B)larva
C)blastula
D)polyp
17.
How do Ascaris eggs enter the human body in order to infect it?
A)through the intestinal tract
B)through the ears
C)through the mouth
D)through the anus
18.
Which of these statements about sponges is NOT true?
A)Most sponges live in marine ecosystems.
B)Sponge bodies have radial symmetry.
C)Most species of sponges are filter feeders.
D)Sponges belong to the phylum Porifera.
19.
Which roundworm is the most common human parasite in the United States?
A)Trichinella
B)pinworms
C)hookworms
D)Ascaris
20.
Which statement is NOT true?
A)A medusa is the sessile form of a cnidarian.
B)A cnidarian uses its tentacles to capture food.
C)Corals and hydras are examples of cnidarians.
D)Some species of cnidarians reproduce sexually.
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