1. The anterior Blastemas of notum RNAi planarians expressed genes that are normally only expressed in the tail

2. They are also known as planarians, although this common name is also used for a wide number of free-living platyhelminthes.

3. The anterior Blastemas of notum RNAi planarians lack a brain and do not express a gene normally expressed specifically in the head (sFRP-1)

4. The utilization of actinomycin D during the regeneration of young and adult Planarians shows that the two groups of animals react differently to the antibiotic.

5. Incubation of Blastemata and adjacent areas of regenerating planarians with labeled CO 2 for periods of 2, 4, 6 and 24 hours revealed a maximal stimulation of DNA at 4-7 hours and of RNA at 6-9 hours after the worms were cut