The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeAppleton, 1898 - 432 páginas |
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Página 260
... pistil in male flowers , and which is formed of mere cellular tissue , can thus act ? Can we suppose that rudimentary teeth , which are subsequently absorbed , are beneficial to the rapidly growing embryonic calf by removing matter so ...
... pistil in male flowers , and which is formed of mere cellular tissue , can thus act ? Can we suppose that rudimentary teeth , which are subsequently absorbed , are beneficial to the rapidly growing embryonic calf by removing matter so ...
Página 318
... PISTILS . The female organs of a flower , which occupy a position in the centre of the other floral organs . The pistil is generally divisible into the ovary or germen , the style and the stigma . PLACENTALIA , PLACENTATA , or Placental ...
... PISTILS . The female organs of a flower , which occupy a position in the centre of the other floral organs . The pistil is generally divisible into the ovary or germen , the style and the stigma . PLACENTALIA , PLACENTATA , or Placental ...
Página 333
... Pistil , rudimentary , ii . 256 . Plants , poisonous , not affecting cer- tain coloured animals , i . 13 . selection , applied to , i . 41 . gradual improvement of , i . 42 . not improved in barbarous countries , i . 43 . Plants ...
... Pistil , rudimentary , ii . 256 . Plants , poisonous , not affecting cer- tain coloured animals , i . 13 . selection , applied to , i . 41 . gradual improvement of , i . 42 . not improved in barbarous countries , i . 43 . Plants ...
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Términos y frases comunes
admit affinity allied species ancient animals appear Archipelago arctic areas become believe birds Cambrian changes characters cies classification climate closely allied common progenitor continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo eral Europe existing extinct fact faunas fertilised fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important individuals inhabitants inherited insects instance intermediate intervals land larvæ less living mammals manner marine Marsupials migration modified descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs sediment seeds Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory tion variations varieties whilst widely different wings