{"id":1714,"date":"2019-11-21T14:41:27","date_gmt":"2019-11-21T13:41:27","guid":{"rendered":"http:\/\/agora.xtec.cat\/cfatarragona\/?p=1714"},"modified":"2019-11-21T14:43:54","modified_gmt":"2019-11-21T13:43:54","slug":"ciencies-naturals-lultim-avantpassat-comu-universal-luca","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/cfatarragona\/geso2\/ciencies-naturals-lultim-avantpassat-comu-universal-luca\/","title":{"rendered":"Ci\u00e8ncies Naturals : L&#8217;\u00faltim avantpassat com\u00fa universal\u00a0 (LUCA)"},"content":{"rendered":"<p><strong>L&#8217;<\/strong><b>\u00faltim avantpassat com\u00fa universal<\/b>\u00a0(en angl\u00e8s,\u00a0<i>last universal common ancestor<\/i>\u00a0o\u00a0<b>LUCA<\/b>) \u00e9s l&#8217;hipot\u00e8tic \u00faltim\u00a0<a title=\"Organisme\" href=\"https:\/\/ca.wikipedia.org\/wiki\/Organisme\">organisme<\/a>\u00a0del qual descendeixen tots els existents. Com a tal, \u00e9s l&#8217;avantpassat com\u00fa m\u00e9s recent de tot el conjunt dels\u00a0<a class=\"mw-redirect\" title=\"\u00c9ssers vius\" href=\"https:\/\/ca.wikipedia.org\/wiki\/%C3%89ssers_vius\">\u00e9ssers vius<\/a>\u00a0actuals i probablement tamb\u00e9 de tots els coneguts com a\u00a0<a class=\"mw-redirect\" title=\"F\u00f2ssils\" href=\"https:\/\/ca.wikipedia.org\/wiki\/F%C3%B2ssils\">f\u00f2ssils<\/a>, encara que no es pot descartar te\u00f2ricament que s&#8217;identifiquin restes d&#8217;altres \u00e9ssers vius d&#8217;una mateixa antiguitat o encara m\u00e9s gran. Tamb\u00e9 se&#8217;l coneix com l&#8217;<i><b>\u00faltim ancestre com\u00fa<\/b><\/i>\u00a0(<i>last common ancestor<\/i>\u00a0o\u00a0<b>LCA<\/b>) o l&#8217;<i><b>\u00faltim ancestre universal<\/b><\/i>\u00a0(LUA o\u00a0<i>Last universal ancestor<\/i>). S&#8217;estima que va viure fa uns 3.500 milions d&#8217;anys.<\/p>\n<p>Cal considerar que LUCA no significa:<\/p>\n<ul>\n<li>El primer organisme viu que va existir.<\/li>\n<li>L&#8217;organisme actual m\u00e9s pr\u00f2xim en les seves caracter\u00edstiques a l&#8217;avantpassat com\u00fa.<\/li>\n<li>Que nom\u00e9s existia aquest organisme al principi.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/f\/f5\/Grand_prismatic_spring.jpg\/1920px-Grand_prismatic_spring.jpg\" target=\"_blank\" rel=\"noopener noreferrer\">Foto<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&#8217;\u00faltim avantpassat com\u00fa universal\u00a0(en angl\u00e8s,\u00a0last universal common ancestor\u00a0o\u00a0LUCA) \u00e9s l&#8217;hipot\u00e8tic \u00faltim\u00a0<a title=\"Organisme\" href=\"https:\/\/ca.wikipedia.org\/wiki\/Organisme\">organisme<\/a>\u00a0del qual descendeixen tots els existents. Com a tal, \u00e9s l&#8217;avantpassat com\u00fa m\u00e9s recent de tot el conjunt dels\u00a0<a class=\"mw-redirect\" title=\"\u00c9ssers vius\" href=\"https:\/\/ca.wikipedia.org\/wiki\/%C3%89ssers_vius\">\u00e9ssers vius<\/a>\u00a0actuals i probablement tamb\u00e9 de tots els coneguts com a\u00a0<a&hellip;  <a href=\"https:\/\/agora.xtec.cat\/cfatarragona\/geso2\/ciencies-naturals-lultim-avantpassat-comu-universal-luca\/\" title=\"Read Ci\u00e8ncies Naturals : L&#8217;\u00faltim avantpassat com\u00fa universal\u00a0 (LUCA)\">Llegeix m\u00e9s\u00bb<\/a><\/p>\n","protected":false},"author":7,"featured_media":1742,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[118],"tags":[],"class_list":["post-1714","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geso2"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/cfatarragona\/wp-json\/wp\/v2\/posts\/1714","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/cfatarragona\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/cfatarragona\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/cfatarragona\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/cfatarragona\/wp-json\/wp\/v2\/comments?post=1714"}],"version-history":[{"count":1,"href":"https:\/\/agora.xtec.cat\/cfatarragona\/wp-json\/wp\/v2\/posts\/1714\/revisions"}],"predecessor-version":[{"id":1738,"href":"https:\/\/agora.xtec.cat\/cfatarragona\/wp-json\/wp\/v2\/posts\/1714\/revisions\/1738"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/cfatarragona\/wp-json\/wp\/v2\/media\/1742"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/cfatarragona\/wp-json\/wp\/v2\/media?parent=1714"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/cfatarragona\/wp-json\/wp\/v2\/categories?post=1714"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/cfatarragona\/wp-json\/wp\/v2\/tags?post=1714"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}