Life is dominated by dissymmetrical actions. I can even foresee that all living species are primordially, in their structure, in their external forms, functions of cosmic dissymmetry. One member of the pair can be distorted continuously into the other. Though one might think that the molecule must go through an achiral point, this is not true.
Chiral molecules lead to macroscopically chiral phases of matter.
Anomalous Elasticity of Polymer Cholesterics Click here to see a poster on this work. Mirror Molecules at the Smithsonian Institute. Images of DNA from the Image Library of Biological Macromolecules at Jena.