{"id":137521,"date":"2013-09-26T08:00:27","date_gmt":"2013-09-26T06:00:27","guid":{"rendered":"http:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/?p=137521"},"modified":"2013-09-03T09:30:28","modified_gmt":"2013-09-03T07:30:28","slug":"vuelve-la-jirafa-en-un-relato-increible-del-parrafo-tricentesimo-octogesimo-sexto-de-el-origen-de-las-especies","status":"publish","type":"post","link":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/2013\/09\/26\/137521","title":{"rendered":"Vuelve la jirafa en un relato incre\u00edble del p\u00e1rrafo tricent\u00e9simo octog\u00e9simo sexto de El Origen de las Especies"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignnone\" src=\"http:\/\/pictures2.todocoleccion.net\/tc\/2013\/01\/09\/35121638.jpg\" alt=\"\" width=\"330\" height=\"418\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Cosas incre\u00edbles hemos le\u00eddo hasta este momento, pero prep\u00e1rense para lo que viene a continuaci\u00f3n. \u00a0No tiene desperdicio\u2026\u2026\u2026..<\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>386<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0With the giraffe, the continued preservation of the individuals of some extinct high-reaching ruminant, which had the longest necks, legs, etc., and could browse a little above the average height, and the continued destruction of those which could not browse so high, would have sufficed for the production of this remarkable quadruped; but the prolonged use of all the parts, together with inheritance, will have aided in an important manner in their co-ordination. With the many insects which imitate various objects, there is no improbability in the belief that an accidental resemblance to some common object was in each case the foundation for the work of natural selection, since perfected through the occasional preservation of slight variations which made the resemblance at all closer; and this will have been carried on as long as the insect continued to vary, and as long as a more and more perfect resemblance led to its escape from sharp-sighted enemies. In certain species of whales there is a tendency to the formation of irregular little points of horn on the palate; and it seems to be quite within the scope of natural selection to preserve all favourable variations, until the points were converted, first into lamellated knobs or teeth, like those on the beak of a goose\u2014then into short lamellae, like those of the domestic ducks\u2014and then into lamellae, as perfect as those of the shoveller-duck\u2014and finally into the gigantic plates of baleen, as in the mouth of the Greenland whale. In the family of the ducks, the lamellae are first used as teeth, then partly as teeth and partly as a sifting apparatus, and at last almost exclusively for this latter purpose.<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>En el caso de la jirafa, la conservaci\u00f3n continua de aquellos individuos de alg\u00fan rumiante extinguido que alcanzasen muy alto, que tuviesen el cuello, las patas, etc., m\u00e1s largos y pudiesen ramonear un poco por encima de la altura media, y la continuada destrucci\u00f3n de los individuos que no pudiesen ramonear tan alto, habr\u00eda sido suficiente para la producci\u00f3n de este notable cuadr\u00fapedo; aunque el uso prolongado de todas las partes, unido a la herencia, habr\u00e1n ayudado de un modo importante a su coordinaci\u00f3n. Respecto a los numerosos insectos que imitan a diversos objetos, no hay nada de improbable en la creencia de que una semejanza accidental con alg\u00fan objeto com\u00fan fue, en cada caso, la base para la labor de la selecci\u00f3n natural, perfeccionada despu\u00e9s por la conservaci\u00f3n accidental de ligeras variaciones que hiciesen la semejanza mucho mayor; y esto habr\u00e1 proseguido mientras el insecto continuase variando y mientras una semejanza, cada vez m\u00e1s perfecta, le permitiese escapar de enemigos dotados de vista penetrante. En ciertas especies de cet\u00e1ceos existe una tendencia a la formaci\u00f3n de peque\u00f1as puntas c\u00f3rneas y regulares en el paladar; y parece estar por completo dentro del radio de acci\u00f3n de la selecci\u00f3n natural el conservar todas las variaciones favorables hasta que las puntas se convirtieron, primero, en prominencias laminares o dientes como los del pico del ganso; luego, en laminillas cortas como las de los patos dom\u00e9sticos; despu\u00e9s, en laminillas tan perfectas como las del pato cucharetero, y, finalmente, en las gigantescas placas o barbas, como las de la boca de la ballena franca. En la familia de los patos, las laminillas se usan primero como dientes; luego, en parte, como dientes y, en parte, como un aparato filtrante, y, por fin, se usan, casi exclusivamente, para este \u00faltimo objeto.<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>Lectura aconsejada:<\/p>\n<p><a href=\"https:\/\/digital.csic.es\/handle\/10261\/76630\">\u00a0Manual para detectar la impostura cient\u00edfica: Examen del libro de Darwin por Flourens.<\/a> Digital CSIC, 2013. 225 p\u00e1ginas.<\/p>\n<p style=\"text-align: justify;\">Imagen de<a href=\"http:\/\/www.todocoleccion.net\/jirafa-pequeno-grabado-plancha-cobre-coloreado-siglo-xviii-ver-descripcion-fotos-anexas~x35121638\"> Todocoleccion.net<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Cosas incre\u00edbles hemos le\u00eddo hasta este momento, pero prep\u00e1rense para lo que viene a continuaci\u00f3n. \u00a0No tiene desperdicio\u2026\u2026\u2026.. \u00a0 \u00a0 386 \u00a0 \u00a0With the giraffe, the continued preservation of the individuals of some extinct high-reaching ruminant, which had the longest necks, legs, etc., and could browse a little above the average height, and the continued destruction of those which could not browse so high, would have sufficed for the production of this remarkable quadruped; but the prolonged use of all the parts, together with inheritance, will have aided in an important manner in their co-ordination. With the many insects\u2026<\/p>\n","protected":false},"author":86,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[1],"tags":[14300],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":4}},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/137521"}],"collection":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/users\/86"}],"replies":[{"embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/comments?post=137521"}],"version-history":[{"count":3,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/137521\/revisions"}],"predecessor-version":[{"id":137535,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/137521\/revisions\/137535"}],"wp:attachment":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/media?parent=137521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/categories?post=137521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/tags?post=137521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}