{"id":702,"date":"2025-11-10T12:03:57","date_gmt":"2025-11-10T12:03:57","guid":{"rendered":"https:\/\/deliry.com\/svt\/?page_id=702"},"modified":"2025-11-10T12:50:40","modified_gmt":"2025-11-10T12:50:40","slug":"page-5","status":"publish","type":"page","link":"https:\/\/deliry.com\/svt\/page-5\/","title":{"rendered":"page 5"},"content":{"rendered":"\n

Kim et Ma\u00efssam – TF<\/p>\n\n\n\n

Pluricellularit\u00e9 et origine de la sexualit\u00e9<\/em><\/strong><\/p>\n\n\n\n

La naissance et l\u2019expansion explosive de la sexualit\u00e9 ont profond\u00e9ment modifi\u00e9 le domaine eucaryote (cellules regroupant tous les organismes, unicellulaires ou multicellulaires, dont elles se caract\u00e9risent par la pr\u00e9sence d’un noyau) tout en le laissant n\u00e9anmoins exclusivement constitu\u00e9 de formes unicellulaires. <\/p>\n\n\n\n

La plus ancienne algue pluricellulaire connue, Bangiomorpha pubescens, <\/em>avait un mode de reproduction sexuel (Butterfield 2000).<\/p>\n\n\n\n

\"\"
Sciences et avenir, \u00ab\u00a0La photosynth\u00e8se des plantes a d\u00e9marr\u00e9 il y a 1,2 milliard d\u2019ann\u00e9es\u00a0\u00bb.<\/figcaption><\/figure>\n\n\n\n

https:\/\/www.sciencesetavenir.fr\/archeo-paleo\/il-y-a-1-2-milliards-d-annees-les-plantes-demarraient-la-photosynthese_119628<\/a><\/p>\n\n\n\n

Il s’agit des plus vieilles algues photosynth\u00e9tiques au monde ont \u00e9t\u00e9 d\u00e9couvertes dans l’Arctique canadien. Il y a 1,25 milliard d’ann\u00e9es, un organisme microscopique mais complexe a \u00ab\u00a0gob\u00e9\u00a0\u00bb une simple bact\u00e9rie photosynth\u00e9tique et gagn\u00e9 ses pouvoirs de photosynth\u00e8se. Il a ensuite transmis l\u2019ADN qui code pour ce processus bio\u00e9nerg\u00e9tique \u00e0 ses descendants\u2026 dont les plantes et les arbres qui produisent la majeure partie de la biomasse de la Terre de nos jours.<\/p>\n\n\n\n

Les innovations \u00e9volutives d\u00fb \u00e0 des changements climatiques <\/em><\/strong> <\/p>\n\n\n\n

L\u2019apparition de la\u00a0reproduction sexu\u00e9e\u00a0favorise la\u00a0diversit\u00e9 g\u00e9n\u00e9tique, stimulant encore les processus \u00e9volutifs. Ces innovations conduisent \u00e0 la\u00a0pluricellularit\u00e9\u00a0et \u00e0 la\u00a0sp\u00e9cialisation des cellules, ouvrant la voie \u00e0 la diversification du vivant. Des changements climatiques ont permis <\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Kim et Ma\u00efssam – TF Pluricellularit\u00e9 et origine de la sexualit\u00e9 La naissance et l\u2019expansion explosive de la sexualit\u00e9 ont profond\u00e9ment modifi\u00e9 le domaine eucaryote (cellules regroupant tous les organismes, unicellulaires ou multicellulaires, dont elles se caract\u00e9risent par la pr\u00e9sence d’un noyau) tout en le laissant n\u00e9anmoins exclusivement constitu\u00e9 de formes unicellulaires. La plus ancienne…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"class_list":["post-702","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/pages\/702","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/comments?post=702"}],"version-history":[{"count":12,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/pages\/702\/revisions"}],"predecessor-version":[{"id":803,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/pages\/702\/revisions\/803"}],"wp:attachment":[{"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/media?parent=702"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}