Astacus has ____ circulatory system.
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The following are correct about Astacus except _____.
A. Hepatopancreased digest and store food
B. Maxillipeds bear gills
C. Pereipods are walking legs
D. Possess coiled gut
Answer: D
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Air passes into the lung of Helix pomatia through the __.
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The pygidium is located on the ____.
A. Second segment on the trunk
B. Third segment on the trunk
C. Fifth segment on the trunk
D. last segment
Answer: D
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The following are features of the Helix radula except ____.
A. it is renewed by odontoblast
B. it is supported by cartilages
C. it is fused to the cuticle
D. it consists of chitin
Answer: B
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The fossil record of Peripatus is referred to as ____.
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Peripatus respire by means of ____.
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____ is a pest on boats.
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In Astacus, eggs are attached to the ____.
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Astacus produces ____.
A. Urine hyptonic to the blood
B. Ammonia
C. Urine hypertonic to the blood
D. B and C
Answer: D
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