Ch. 30 Lab Manual

Question 1

1. Ecdysis is the process of _____________.
   a. obtaining heat
   b. releasing heat
   c. molting
   d. mating

Answer 1

molting

Question 2

2. Presently, there are more than ___________ species of Arthropoda.
   a. 1,000
   b. 10,000
   c. 100,000
   d. 1,000,000

Answer 2

1,000,000

Question 3

3. Members of phylum Nematoda live in which of the following environments?
   a. Soil.
   b. Freshwater and marine.
   c. Within animals, as parasites.
   d. All of the above.
   e. B and C.

Answer 3

All of the above

Question 4

4. Rich topsoil can contain more than how many nematodes per acre?
   a. 1 thousand.
   b. 1 million.
   c. 1 billion.
   d. 1 trillion.

Answer 4

1 Billon

Question 5

5. Unlike spiders, harvestmen, also known as “daddy longlegs,” have ____.
   a. a cephalothorax and abdomen
   b. a single pair of eyes
   c. eight legs
   d. fangs

Answer 5

a single pair of eyes

Question 6

6. “Daddy longlegs” are ________________.
   a. the most venomous animal to humans
   b. venomous to most mammals, excluding humans
   c. harmless; they do not even have fangs
   d. not venomous to humans

Answer 6

not venomous to humans

Question 7

7. Nematodes move in a thrashing fashion by using ______.
   a. circular muscles
   b. longitudinal muscles
   c. cilia
   d. mucus

Answer 7

longitudinal muscles

Question 8

8. How many pairs of legs do most species of centipedes have?
   a. 100
   b. 50
   c. 30
   d. 60

Answer 8

30

Question 9

9. Millipedes are ________________.
   a. carnivorous
   b. detritivorous
   c. herbivorous
   d. all of the above
   e. B and C

Answer 9

B and C

Question 10

10. The study of insects is called _____________.
    a. etymology
    b. biology
    c. enthology
    d. entomology

Answer 10

entomology

Question 11

11. What type of coelom is found in the phylum Nematoda?
    a. True coelom.
    b. Pseudocoelom.
    c. Acoelomate.
    d. A and B, depending on the species of nematode.

Answer 11

Pseudocoelom

Question 12

12. The grasshopper’s tympanic organs are responsible for _____.
    a. hearing
    b. breathing
    c. excreting
    d. mating

Answer 12

hearing

Question 13

13. What makes ecdysozoans particularly vulnerable to prey?
    a. Their small size.
    b. Lack of camouflage.
    c. Shedding of protective cuticle or exoskeleton.
    d. Damage caused by ecdysis.

Answer 13

Shedding of protective cuticle or exoskeleton

Question 14

14. Which of the following is a characteristic of a nematode?
    a. Tapered at both ends.
    b. Protective cuticle.
    c. Circular muscles.
    d. All of the above.
    e. A and B.

Answer 14

A and B.

Question 15

15. What feature of Ascaris distinguishes a specimen as male?
    a. The presence of a rectum.
    b. A length of 30 cm or more.
    c. Posterior end is curved.
    d. Coloration.

Answer 15

Posterior end is curved.

Question 16

16. What is the function of the green gland in the crayfish?
    a. Digestive.
    b. Reproductive.
    c. Excretory.
    d. None of the above.

Answer 16

c. Excretory.

Question 17

17. Horseshoe crabs lack which of the following?
    a. Mandibles.
    b. Walking legs.
    c. Antennae.
    d. All of the above.
    e. A and C.

Answer 17

d. All of the above.

Question 18

18. Horseshoe crabs utilize _____________for breathing.
    a. book gills
    b. tracheae
    c. body surface
    d. book lungs

Answer 18

a. book gills

Question 19

19. All members of subphylum Myriapoda ______.
    a. live only on land
    b. are herbivorous
    c. lack a chitinous exoskeleton
    d. live on land and in freshwater

Answer 19

a. live only on land

Question 20

20. Insects vary from other arthropods by having _______________.
    a. three pairs of wings and two pairs of legs
    b. one pair of wings and three pairs of legs
    c. two pairs of wings and three pairs of legs
    d. two pairs of wings and eight pairs of legs

Answer 20

two pairs of wings and three pairs of legs

Question 21

21. Female pinworms will migrate to which opening of an infected host?
    a. Mouth.
    b. Anus.
    c. Eyes.
    d. Ears.

Answer 21

Anus.

Question 22

22. Name this structure in the crayfish.

a. Teeth.
b. Mandible.
c. Gastric mill.
d. Green gland.

Answer 22

b. Mandible.

Question 23

23. These organisms are thought to be the ancestors of all living arthropods.
    a. Horseshoe crabs.
    b. Trilobite-like organisms.
    c. Members of the subphylum Chelicerata.
    d. None of the above.

Answer 23

b. Trilobite-like organisms.

Question 24

24. What does a millipede do when it is disturbed?
    a. It gives a poisonous bite.
    b. It shocks its prey with venom claws.
    c. It secretes a poisonous mucus from the chitinous exoskeleton.
    d. It emits a foul-smelling odor.

Answer 24

d. It emits a foul-smelling odor.

Question 25

25. Which of the following have bodies divided into a head, thorax, and abdomen?
    a. Grasshoppers.
    b. Crayfish.
    c. Ants.
    d. A and C.

Answer 25

d. A and C.

Question 26

26. Which of the following characteristics are found in the grasshopper?
    a. Body divided into a head, thorax, and abdomen.
    b. Two pair of wings.
    c. Body divided into cephalothorax and abdomen.
    d. A and B.
    e. B and C.

Answer 26

d. A and B.

Question 27

27. Name this structure in the crayfish.

a. Brain.
b. Mandibular muscle.
c. Gastric muscle.
d. Green gland.

Answer 27

d. Green gland.

Question 28

28. What is the function of pleopods in crustaceans?
    a. Swimming.
    b. Steering.
    c. Eating.
    d. Breathing.

Answer 28

a. Swimming.

Question 29

29. Which pairing of arthropods does not belong in the same subphylum?
    a. Copepods and shrimp.
    b. Mosquito and housefly.
    c. Centipede and scorpion.
    d. Spider and dust mite.

Answer 29

c. Centipede and scorpion.

Question 30

30. Infection from a ______ can cause stunted growth because of protein deficiency.
    a. pinworm
    b. hookworm
    c. ringworm
    d. heartworm

Answer 30

b. hookworm