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What is the importance of earthworm in agriculture? and what are the different organs in the digestive tract of an earthworm?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter31: Animal Phylogeny, Acoelomates, And Protostomes

Section: Chapter Questions

Problem 5TYK: Which organ system is absent in flatworms (phylum Platyhelminthes)? a. nervous system b....

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