tag:blogger.com,1999:blog-10781944.post3738295943279254900..comments2024-03-28T00:36:36.460-07:00Comments on The Tree of Life: Sharpshooters, dual symbioses and new ways to sequence a genomeJonathan Eisenhttp://www.blogger.com/profile/07953790938128734305noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-10781944.post-52582757446882573352007-12-08T16:27:00.000-08:002007-12-08T16:27:00.000-08:00Overall, I think in most cases the explanation is ...Overall, I think in most cases the explanation is more like the latter. I think that there are many means by which organisms can evolve novelty. But if the probability of a solution coming through symbioses is really high, as it seems to be in many cases, then there is no chance for other solutions to evolve --- once a sap feeding insect evolves a symbiosis to get its amino acids, there is little selective pressure to evolve amino acid synthetic pathways on its own.Jonathan Eisenhttps://www.blogger.com/profile/07953790938128734305noreply@blogger.comtag:blogger.com,1999:blog-10781944.post-11437699969324984602007-12-08T11:23:00.000-08:002007-12-08T11:23:00.000-08:00I've been wondering for a while why multi-cellular...I've been wondering for a while why multi-cellular species are not able to synthesize so many things themselves and must rely on symbiotic single-celled organisms inside them. Is there some sort of complexity limit that causes this or is there simply so much greater diversity among single-celled organisms that piggybacking off their talents is something of a free-lunch?TGGPhttps://www.blogger.com/profile/11017651009634767649noreply@blogger.com