 | 1861 - 712 páginas
...animals to the grouping of the stars ; the stem and branches of a tree better illustrate Darwin's idea. The green and budding twigs may represent existing species ; and those produced during each former year may represent the long succession of extinct species. At each period of growth all... | |
 | Samuel Butler - 1924 - 426 páginas
...step." * This has been well extended by Mr. Darwin in a passage which begins : " The affinities of all beings of the same class have sometimes been represented by a great tree. I believe that this simile largely speaks the truth."8 " What, then," continues Lamarck, " can be the cause of... | |
 | Woodbridge Riley - 1926 - 376 páginas
...grasp. Darwin himself has made it clear in a diagram which he calls "the great tree of life." Here the green and budding twigs may represent existing species, and those produced during former years, the long succession of extinct species. At each period of growth all the growing twigs have tried to... | |
 | 1999 - 428 páginas
[ Lo sentimos, el contenido de esta página está restringido. ] | |
 | Gustav Kirchner - 1956 - 404 páginas
[ Lo sentimos, el contenido de esta página está restringido. ] | |
 | William S. Knickerbocker - 1927 - 410 páginas
...and the complex action of natural selection, entailing extinction and divergence of character . . . The affinities of all the beings of the same class...a great tree. I believe this simile largely speaks 244 CLASSICS OF MODERN SCIENCE the truth. The green and budding twigs may represent existing species... | |
 | Charles Darwin - 1964 - 564 páginas
[ Lo sentimos, el contenido de esta página está restringido. ] | |
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The affinities of all the beings of the same class have sometimes been represented by a great tree. I believe this simile largely speaks the truth. The green and budding twigs may represent existing species ; and those produced during each former year... 
