{"id":138267,"date":"2014-04-11T08:00:01","date_gmt":"2014-04-11T06:00:01","guid":{"rendered":"http:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/?p=138267"},"modified":"2014-03-24T18:17:33","modified_gmt":"2014-03-24T16:17:33","slug":"lo-imposible-en-el-parrafo-quingentesimo-decimosexto-de-el-origen-de-las-especies","status":"publish","type":"post","link":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/2014\/04\/11\/138267","title":{"rendered":"Lo imposible en el p\u00e1rrafo quingent\u00e9simo decimosexto de El Origen de las Especies"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignnone\" src=\"http:\/\/img.blogdecine.com\/2012\/11\/lo%20imposible%202012%20the%20impossible%20poster%20taquilla.jpg\" alt=\"\" width=\"390\" height=\"282\" \/><\/p>\n<p>Nos viene a sorprender el autor de nuevo en el resumen final de este insoportable cap\u00edtulo con una de sus ideas Marxistas (v. Grouchista):<\/p>\n<p><em>La esterilidad presenta todos los grados<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>La esterilidad es esterilidad. Es decir, ausencia de reproducci\u00f3n. No hay grados.<\/p>\n<p>&nbsp;<\/p>\n<p><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>516<\/em><\/p>\n<p style=\"text-align: justify;\"><em>SUMMARY OF CHAPTER.<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>First crosses between forms, sufficiently distinct to be ranked as species, and their hybrids, are very generally, but not universally, sterile. The sterility is of all degrees, and is often so slight that the most careful experimentalists have arrived at diametrically opposite conclusions in ranking forms by this test. The sterility is innately variable in individuals of the same species, and is eminently susceptible to action of favourable and unfavourable conditions. The degree of sterility does not strictly follow systematic affinity, but is governed by several curious and complex laws. It is generally different, and sometimes widely different in reciprocal crosses between the same two species. It is not always equal in degree in a first cross and in the hybrids produced from this cross.<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>Los primeros cruzamientos entre formas lo bastante distintas para que sean clasificadas como especies y los h\u00edbridos de ellas, son muy generalmente -aunque no siempre- est\u00e9riles. La esterilidad presenta todos los grados, y con frecuencia es tan ligera, que los experimentadores m\u00e1s cuidadosos han llegado a conclusiones diametralmente opuestas al clasificar formas mediante esta prueba. La esterilidad es variable por disposici\u00f3n innata en individuos de la misma especie, y es sumamente sensible a la acci\u00f3n de condiciones favorables y desfavorables. El grado de esterilidad no acompa\u00f1a rigurosamente a la afinidad sistem\u00e1tica, sino que es regulado por diferentes leyes curiosas y complicadas. En general es diferente -y a veces muy diferente- en los cruzamientos rec\u00edprocos entre dos mismas especies. No siempre es del mismo grado en el primer cruzamiento y en los h\u00edbridos producidos por \u00e9ste.<\/em><\/p>\n<p style=\"text-align: justify;\">\n<p>Lectura aconsejada:<\/p>\n<ul>\n<li><a href=\"https:\/\/digital.csic.es\/handle\/10261\/76630\"> Manual para detectar la impostura cient\u00edfica: Examen del libro de Darwin por Flourens.<\/a> Digital CSIC, 2013. 225 p\u00e1ginas.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Nos viene a sorprender el autor de nuevo en el resumen final de este insoportable cap\u00edtulo con una de sus ideas Marxistas (v. Grouchista): La esterilidad presenta todos los grados &nbsp; La esterilidad es esterilidad. Es decir, ausencia de reproducci\u00f3n. No hay grados. &nbsp; \u00a0 \u00a0 516 SUMMARY OF CHAPTER. \u00a0 First crosses between forms, sufficiently distinct to be ranked as species, and their hybrids, are very generally, but not universally, sterile. The sterility is of all degrees, and is often so slight that the most careful experimentalists have arrived at diametrically opposite conclusions in ranking forms by this test.\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":[467,14293,6720,14310],"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\/138267"}],"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=138267"}],"version-history":[{"count":3,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/138267\/revisions"}],"predecessor-version":[{"id":138269,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/138267\/revisions\/138269"}],"wp:attachment":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/media?parent=138267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/categories?post=138267"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/tags?post=138267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}