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Which two types of structures make up the earthworm's heart?
A. Organ systems
B. Specialized cells
C. Tissues
D. Organisms
Answers: 3
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In "the man in the water," what was the remarkable occurrence that rosenblatt reported?
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Which two types of structures make up the earthworm's heart?
A. Organ systems
B. Specia...
B. Specia...
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