Symmetry Transformations in Metazoan Evolution and Development

A genomic parasite in the evolution of metazoan development.

It is a challenge to understand how development emerged as a mechanism to dismantle and dismiss the intromission of foreign parasites in order to consolidate a higher-level multicellular unit of selection where more heritable variations in fitness, required for complex organization, can be procured. Levels in biological hierarchy genes, networks of genes, chromosomes, cells, organisms, etc., po...

Cnidarian milestones in metazoan evolution.

Cnidarians display most of the characters considered as milestones of metazoan evolution. Whereas a tissue-level organization was probably already present in the multicellular common ancestor of all animals, the Urmetazoa, the emergence of important animal features such as bilateral symmetry, triploblasty, a polarized nervous system, sense organs (eyes, statocysts), and a (chitinous or calcium-...

Basal Metazoan Sensory Evolution

Transformations to Symmetry and Homoscedasticity

This paper considers transformations in regression to eliminate skewness and heteroscedasticity of the response. We work with the "transform-both-sides" model where the relationship between the 'lledian response and the independent varibles has been identified, at least tentatively. To preserve this relationship, the response and the regression model are transformed in the same way. Extending t...

Evolving “Metazoan” Development

A paradigm system for the evolution of multicellular animals is constructed. In many evolutionary models, the non-linearity of the genome-phenome mapping is ignored. However, the results of evolutionary paradigm systems that did include a non-trivial, complex genome-phenome mapping have suggested a framework joining seemingly conflicting evolutionary “points of view” like neutral evolution, Pun...