Citizens of the World State are cremated when they die, so their bodies can be recycled and used as fertilizer. Their bodies aren't considered valuable, there are no funerals or grieving of the dead.
Hope this helps!
-Payshence xoxo
Explanation:
Evolution involves changing the hereditary characteristics of a population through generations. These traits are the expression of genes that are passed on to offspring during reproduction.
Pretty sure the answer to this question is neurons or nerve cells.