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Cake day: June 13th, 2023

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  • I can’t see how Lamarck’s theories can be seen as aligned with more “dynamic” theories like the extended evolutionary synthesis. The idea that an organism’s evolutionary potential is completely embodied by its current traits (even including epigenetically-transmitted traits like niche construction) renders it purely reactive: inert clay whose every change is dictated by the external pressures of natural selection.

    A separately-transmitted genome with some components hidden from selection is the only way for organisms to evolve dynamic strategies for reacting to selection in ways not completely determined by their expressed traits.













  • the researchers constructed a theoretical model where the transient increase in motility served as a “memory” of the enzyme’s immediate past reaction event. The enzyme used this information to leave the product molecules, thereby eliminating the probability of the reverse reaction.

    So if I’m understanding correctly, just after an enzyme catalyzes a reaction it “remembers” that the products it just produced must still be nearby and knocks itself away from them?