Chapter 26
Multiple Choice
Identify the choice that best completes the statement or answers the question.
1.Nematocysts discharge when _____.
A. salt concentration in the ocean drops
C. cnidarians reproduce
B. a cnidarian regenerates
D. tentacles touch a source of food
2.A group of cnidarians that provide food and shelter for many kinds of animals are the _____.
A. hydras
C. corals
B. sea anemones
D. jellyfishes
3.In a cnidarian, digestion occurs in the _____.
A. gastrovascular cavity
C. digestive tract
B. proglottids
D. tentacles
4.The collar cells of sponges are similar to _____.
A. amoebas
C. sessile sporozoans
B. ciliated paramecia
D. flagellated protists
Figure 26-3
5.Which of the two organisms shown in Figure 26-3 releases gametes?
A. B
C. both
B. A
D. neither
6.How are the two organisms shown in Figure 26-3 different?
A. only B is poisonous
C. A is a cnidarian and B is not
B. A moves but B doesn’t
D. A is a medusa and B is a polyp colony
Figure 26-4
7.Which organism shown in Figure 26-4 is of a phylum that can infect plants?
A. B
C. A
B. C
D. D
8.Which organism shown in Figure 26-4 is a parasite that requires two hosts?
A. C
C. A
B. B
D. D
9.Which organism shown in Figure 26-4 does not have hooks and suckers on its mouth?
A. D
C. A
B. C
D. B
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10.What can be inferred from Figure 26-5?
Roundworm Infections
Number of Cases
Low Temperature
Day
300
60
1
295
58
5
290
55
10
320
51
15
303
55
20
295
45
25
15
25
30
Figure 26-5
A. this species of roundworm does not flourish in warm weather
B. this species of roundworm becomes dormant in warm weather
C. this species of roundworm cannot survive outside hosts at 25 degrees
D. this species of roundworm is widespread
11.Uncooked or undercooked pork may contain _____.
A. trichina worms
C. free-living roundworms
B. hookworms
D. pinworms
12.A Portuguese man-of-war is an example of _____.
A. an anthozoan
C. a sea anemone
B. a hydrozoan colony
D. a large scyphozoan
Figure 26-2
13.In Figure 26-2, how did the structure labeled A develop?
A. fragmentation
C. formation of gametes
B. fertilization by sperm
D. asexually by budding
14.Which structure shown in Figure 26-2 analogous to an anus?
A. C
C. B
B. D
D. A
15.A _____ has a muscular tube called the pharynx, which can be extended outside its body to suck in fooD.
A. sponge
C. tapeworm
B. planarian
D. jellyfish
16.Because sponges are sessile, they get their food through _____.
A. the spicules
C. filter feeding
B. scavenging the seafloor
D. tentacles
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17. What phylum does the animal below belong to?
A. Nematoda
B. Cnidaria
18.What phylum does the animal below belong to?
A. Nematoda
B. Cnidaria
C. Platyhelmenthes
D. Porifera
C. Platyhelmenthes
D. Porifera
19.What phylum does the animal below belong to?
A. Nematoda
B. Cnidaria
C. Platyhelmenthes
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D. Porifera
20. What phylum does the animal below belong to?
A. Nematoda
B. Cnidaria
C. Platyhelmenthes
Bonus Question (5 points)
What is the name of the animal in question 19?
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D. Porifera
Chapter 26
Answer Section
MULTIPLE CHOICE
1. ANS: D
NAT: A1 | C1 | C3
PTS: 1
DIF:
STA: 3.A | 4.E | 11.B.2
B
OBJ: 26-5
2. ANS: C
PTS: 1
DIF:
NAT: A1 | C5 | C6 STA: 10.B.2 | 10.B.3
B
OBJ: 26-3
3. ANS: A
NAT: A1 | C1 | C3
PTS: 1
DIF:
STA: 3.A | 4.E | 11.B.2
B
OBJ: 26-5
4. ANS: D
NAT: C1 | C5 | C6
PTS: 1
DIF:
STA: 3.A | 4.E | 10.A.7
B
OBJ: 26-1
5. ANS: B
NAT: A1 | C1 | C3
PTS: 1
DIF:
STA: 10.A.5 | 10.A.8
A
OBJ: 26-4
6. ANS: D
PTS: 1
DIF:
NAT: A1 | C5 | C6 STA: 10.B.2 | 10.B.3
A
OBJ: 26-3
7. ANS: D
PTS: 1
DIF: B
NAT: UCP1 | UCP4 | A1 | A2 | C5 | C6 | E2 | F1
OBJ: 26-9
STA: 10.B.2 | 10.B.3
8. ANS: A
PTS: 1
DIF:
NAT: A1 | C3 | C5 STA: 3.A | 4.E | 11.B.2
B
OBJ: 26-7
9. ANS: C
PTS: 1
NAT: A1 | C3 | C5 STA: 3.A | 4.E
DIF:
A
OBJ: 26-6
DIF:
A
OBJ: 26-8
10. ANS: C
NAT: C5 | C6 | E1
PTS: 1
STA: 3.A | 4.E
11. ANS: A
PTS: 1
DIF: B
NAT: UCP1 | UCP4 | A1 | A2 | C5 | C6 | E2 | F1
OBJ: 26-9
STA: 10.B.2 | 10.B.3
12. ANS: B
PTS: 1
DIF:
NAT: A1 | C5 | C6 STA: 10.B.2 | 10.B.3
B
OBJ: 26-3
13. ANS: D
NAT: C1 | C5 | C6
PTS: 1
DIF:
STA: 3.A | 4.E | 10.A.5
A
OBJ: 26-2
14. ANS: C
NAT: C1 | C5 | C6
PTS: 1
DIF:
STA: 3.A | 4.E | 10.A.7
A
OBJ: 26-1
B
OBJ: 26-6
15. ANS: B
PTS: 1
NAT: A1 | C3 | C5 STA: 3.A | 4.E
DIF:
5
16. ANS: C
NAT: C1 | C5 | C6
PTS: 1
DIF:
STA: 3.A | 4.E | 10.A.7
B
OBJ: 26-1
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