(a.) Homogenous; -- applied to that class of homologies which arise from similarity of structure, and which are taken as evidences of common ancestry.

abiogenetic aboriginal basal basic biogenetic blastogenetic causative central constructive creative crucial demiurgic elemental elementary embryonic epigenetic eumerogenetic formative fundamental gametic genetic genial genital genitive germinal heterogenetic histogenetic homogenetic in embryo in ovo inventive isogenetic merogenetic metagenetic monogenetic original originative orthogenetic pangenetic parthenogenetic phytogenetic pregnant primal primary primeval primitive primordial pristine productive protogenic radical rudimentary seminal sporogenous xenogenetic