Summarize How Myriapods Avoid Desiccation In Terrestrial


1. For each pair of terms, explain how the meanings of the terms differ.

a. mandible and chelicera b. isopod and decapod c. cephalothorax and abdomen d. antennae and antennules e. cheliped and telson f. book lung and trachea

2. Explain the relationship between the cephalothorax and the thorax.

3. Choose the term that does not belong in the following group, and explain why it does not belong: book lung, trachea, spiracle, and green gland.

4. Word Roots and Origins The word tagma is derived from the Greek tassein, which means "to arrange." Using this information, explain why the term tagma is a good name for the structure that the term describes.

Understanding Key Concepts

5. Describe the key characteristics of arthropods.

6. Explain how arthropods molt.

7. List the five subphyla of arthropods.

8. Summarize the major characteristics of crustaceans.

9. Explain how a barnacle feeds.

10. Summarize the function of the major appendages of a crayfish.

11. Describe excretion in a crayfish.

12. Compare respiration in crayfish and spiders.

13. Identify the main characteristics of the members of subphylum Chelicerata.

14. Compare the appendages on the cephalothorax of a spider with those of a scorpion.

15. List three predatory behaviors of spiders.

16. Identify a distinguishing characteristic of mites.

17. Explain how parasitic ticks spread diseases.

18. Identify the main characteristics of the members of subphylum Myriapoda.

19. Compare the characteristics of millipedes and centipedes.

20. Summarize how myriapods avoid desiccation in terrestrial environments.

21. IX CONCEPT MAPPING Use the following □ □ □ terms to create a concept map that sequences the process of molting in an arthropod: exoskeleton, enzymes, inner layer, hormone, molting, and epidermis.


22. Interpreting Graphics Identify structures A through F in the diagram below.

23. Applying Information Arthropods first lived on land about 400 million years ago. They have survived several time periods in which other phyla became extinct. What characteristics might have enabled arthropods to survive and adapt?

24. Relating Concepts A water flea of the genus Daphnia eats algae. How might this organism acquire its food?

25. Inferring Relationships Barnacles are sessile crustaceans. What adaptation enables them to compete with motile organisms for food? What adaptation protects them from predators?

26. Recognizing Relationships The cephalothorax of a crayfish is covered by the carapace, a fused plate of exoskeleton. What are some advantages and disadvantages of this fused structure?

27. Analyzing Patterns Crayfish have a high concentration of sensory hairs on the telson. What might be the advantage of having so many sensory structures at the posterior end?

Ms/ Standardized Test Preparation

DIRECTIONS: Choose the letter of the answer choice that best answers the question.

1. What do all arthropods have in common?

A. spiracles

B. antennae

C. a cephalothorax

D. jointed appendages

2. What is the chitin-containing structure that protects and supports the body of an arthropod?

F. a tagma

G. a chelicera

H. an appendage J. an exoskeleton

3. Which of the following statements about compound eyes is true?

A. Compound eyes have a single lens.

B. Compound eyes are located on the abdomen of scorpions.

C. Compound eyes are found in all arthropods except crayfish.

D. Compound eyes are composed of many individual light detectors.

4. What are the major respiratory organs of crayfish?

F. gills

G. lungs

H. tracheae

J. book lungs

5. How do mites and ticks differ from spiders?

A. Mites and ticks have mandibles.

B. Mites and ticks have two pairs of antennae.

C. Mites and ticks have a unique respiratory system.

D. Mites and ticks have a fused cephalothorax and abdomen.

INTERPRETING GRAPHICS: The illustration below shows four animals. Use the illustration to answer the question that follows.


Grasshopper Hydra



Grasshopper Hydra


6. Which animal has a chitinous exoskeleton?

F. snail

G. grasshopper

H. hydra J. squid

DIRECTIONS: Complete the following analogy.

7. mandible : crayfish :: chelicera :

A. pill bug

B. scorpion

C. barnacle

D. millipede

INTERPRETING GRAPHICS: The graph below shows data about molting and two causes of mortality in crabs. Use the graph to answer the questions that follow.

Molting and Mortality Rates



In molt

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  • Felix
    How do myriapods avoid desiccation?
    2 years ago
  • Melba
    How did myriapods adapt?
    5 months ago

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