Gaseous exchange in earthworm
& polychaetes
1. How is gas exchange
accomplished by earthworms?
2. What is the function of the
nephridia of the molluscs?
4. How does gas exchange take
place in marine polychaetes?
5. How does the body organization
of crustaceans differ from the body organization of flightless insects?
6. Name and list four characteristics
of arthropods that have enabled them to be extremely successful, and describe
the adaptive value of each characteristic.





