A Long Train With Many Cars.....
a:  A polymer ~
b:  a freight train
What:  "a  polymer is like a freight train with many cars.  The individual cars would represent the monomers making up the polymer.  If two monomers are joined then the resulting molecule is a dimer, if three monomers are linked, it's called a trimer, and so on...
 Thus, life is modular or has a modular construction."
Useful?
Writer:  Dr. S.G. Saupe
LCC: 
Where:
Date:   May 13 2013  6:35 PM
# 3163 Critique Analogy
