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Standardized Test Preparation

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

1. Why do terrestrial snails and slugs need an environment with a high moisture content?

A. to avoid drying out

B. to see and hear better

C. to swim more efficiently

D. to avoid being eaten by birds

2. Which of the following are the only mollusks with a closed circulatory system?

F. snails

G. bivalves

H. gastropods

J. cephalopods

3. Annelids are divided into three classes based partly on the number of which of the following?

A. setae

B. segments

C. nephridia

D. aortic arches

4. Parapodia are a distinguishing characteristic of which class of annelids?

F. Bivalvia

G. Hirudinea

H. Polychaeta J. Oligochaeta

INTERPRETING GRAPHICS: The diagram below shows the internal structure of a bivalve. Use the diagram to answer the questions that follow.

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