What is the purpose of studying and dissecting an earthworm?

When studying an earth worm, we could see all the amazing things God gave this creature and how it survives. If we dissect an earthworm, we will probably find out that it has multiple flexible parts that allow it to move around under ground. We could test this by filling a see through tank of some sort with dirt and water. We find an earthworm and let it stay in. We could examine that the worm stays on the surface for a little and than proceeds to its hole making. After a while, we could examine the tank and find that the dirt has many holes around it. Eventually let the worm go! This project could teach you something about worms. Worms are also helpful creatures. They provide the plants all the nutrients they need. 

Hopefully I helped your question... but please make sure it's school related because people lose there time on, to answer these for you! :) I was happy to help! :) ;)

Ther are many reasons.. is it a multiple choice?