ellauri162.html on line 800: There are six stages to embryonic development, and the pharyngula stage is towards the middle. In the early stages of development there is significant diversity in the morphology of embryos, this diversity decreases over time till the pharyngula stage where they are most similar (often difficult for anyone but trained embryologist to differentiate), and finally in the last stages of development morphology diversifies again. It is hypothesized that the reason the pharyngula stage is so morphologically constrained is that this is the point where sequential activation of hox genes is initiated so any strong deviations from the developmental plan would lead to drastic changes in the final phenotype of the organism.
ellauri162.html on line 818: The Haeckelian form of recapitulation theory is considered defunct. Embryos do undergo a period or phylotypic stage where their morphology is strongly shaped by their phylogenetic position, rather than selective pressures, but that means only that they resemble other embryos at that stage, not ancestral adults as Haeckel had claimed.
ellauri183.html on line 315: Sylvain Bromberger oli väpelöhkö filosofian proffa MITssä. 1924-2018. His research in the philosophy of linguistics, carried out in part with the late Institute Professor Morris Halle of the linguistics section, included investigations into the foundations of phonology and of morphology.
xxx/ellauri116.html on line 222: Inflection of גִּזְעָנוּת, Noun – feminine. Root: ג - ז - ע. The final radical of this word is guttural; this affects the adjacent vowels. Derived from גִּזְעָן racist and ־וּת. Meaning racism. From גֶּזַע Noun – ketel pattern, masculine, Meaning trunk (of a tree); race (anthropology); stem (morphology, linguistics).
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