Ulo

5. Which of the structures is involved in respiration and feeding?

6. What is structure B?

G. a siphon

H. the mantle

J. an adductor muscle

DIRECTIONS: Complete the following analogy.

7. Nephridium : excretion :: clitellum :

A. digestion

B. circulation

C. respiration

D. reproduction

INTERPRETING GRAPHICS: The diagram below shows the mouth structure of a class of organisms. Use the diagram to answer the question that follows.

8. In which class of organisms is the mouth structure shown above most likely to be found?

F. bivalves

G. hirudines

H. gastropods J. polychaetes

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