title: The effect of genic time-factors upon growth and differentiation as observed in certain snail shells, bivalves and plants.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D005796:Genes; D008974:Mollusca / Q000254:growth & development*; D063245:Plant Development; D012908:Snails / Q000254:growth & development*; D013997:Time Factors