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EVIDENCE FOR INVERSION. "The "dorsal-ventral inversion" hypothesis failed to gain broad acceptance until 1995, when homologous D-V patterning mechanisms were found to be operating in vertebrates and insects." https://lnkd.in/dph5vzr View in LinkedIn

HAD ENOUGH OF REGURGITATED TRUMP NEWS? “Twentieth century media forged new kinds of mass imaginaries, collectives championed or feared for their capacity to consume and think and act in concert. And this new mass was also said to remember, to hold a vision of a shared past, to make and remake collective memory.”" " https://lnkd.in/dWiV2eZ View in LinkedIn

The coin in the stone. View in LinkedIn

SO ENDS this weekend on the theme of symmetry in body plans of animals. It illustrates that if you take the seemingly merest topic in nature, there is a full universe in that morsel. Grown men have dedicated their lives to studying this topic, concentrating the full force of their considerable energy and intellect on figuring out the distribution and purpose of body plan symmetry, leaving a delightful legacy for the rest of us mortals to enjoy. Nothing is too small to obsess over. View in LinkedIn

COMMON SCAFFOLD. "Since their divergence, bilaterians appear to have elaborated upon this organizational scaffold to a greater degree than their cnidarian sister group (e.g., deploying a greater number of Hox genes to encode a finer degree of regionalization), and they have invented numerous organs and structures to superimpose upon the scaffold such as brains, circulatory systems, skeletal systems, locomotory structures, digestive organs, and sense organs." https://lnkd.in/dph5vzr View in LinkedIn

COMMON BODY PLAN. "It may be the case that bilaterians and cnidarians inherited the same basic axial ground plan from their common ancestor." https://lnkd.in/dph5vzr View in LinkedIn

PATTERNING HOMOLOGY. "Attempting to infer structural homology from molecular evidence is fraught with difficulty. However, the hypothesis presented here does not imply structural homology. Rather, the utilization of homologous developmental genes by cnidarians and bilaterians to pattern their primary and secondary body axes suggests homology at the level of the patterning mechanisms themselves, not the structures whose locations are governed by the patterning mechanisms." https://lnkd.in/dph5vzr View in LinkedIn

DEFINITION. “A synapomorphy is a shared, derived character, common between an ancestor and its descendants.” https://lnkd.in/daNkDTJ View in LinkedIn