Earthworms have multiple hearts that pump blood throughout the body in vessels.They also ingest soil,digest the organic matter,and eliminate the indigestible particles as castings.Earthworms have which of the following?
A) a complete digestive tract and open circulatory system
B) a complete digestive tract and closed circulatory system
C) an incomplete digestive tract and closed circulatory system
D) an incomplete digestive tract and open circulatory system
Correct Answer:
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