The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1920 - 432페이지 |
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vi 페이지
... habits of life - Diversified habits in the same species - Species with habits widely different from those of their allies - Organs of extreme perfection - Modes of transition - Cases of difficulty - Natura non facit saltum - Organs of ...
... habits of life - Diversified habits in the same species - Species with habits widely different from those of their allies - Organs of extreme perfection - Modes of transition - Cases of difficulty - Natura non facit saltum - Organs of ...
vii 페이지
... habits , but different in their origin - Instincts graduated - Aphides and ants - Instincts variable - Domestic instincts , their origin - Natural instincts of the cuckoo , molothrus , ostrich , and parasitic bees - Slave - making ants ...
... habits , but different in their origin - Instincts graduated - Aphides and ants - Instincts variable - Domestic instincts , their origin - Natural instincts of the cuckoo , molothrus , ostrich , and parasitic bees - Slave - making ants ...
xii 페이지
... habits of the Molothrus . On fertile hybrid moths . The discussion on the fertility of hybrids not having been acquired through natural selection condensed and modified . On the causes of sterility of hybrids , added to and corrected ...
... habits of the Molothrus . On fertile hybrid moths . The discussion on the fertility of hybrids not having been acquired through natural selection condensed and modified . On the causes of sterility of hybrids , added to and corrected ...
xvii 페이지
... habits of life . The work , from its powerful and brilliant style , though displaying in the earlier editions little accurate knowledge and a great want of scientific caution , imme- diately had a very wide circulation . In my opinion ...
... habits of life . The work , from its powerful and brilliant style , though displaying in the earlier editions little accurate knowledge and a great want of scientific caution , imme- diately had a very wide circulation . In my opinion ...
8 페이지
... Habit and of the Use or Disuse of Parts ; Correlated Variation ; Inheritance . Changed habits produce an inherited effect , as in the period of the flowering of plants when transported from one climate to another . With animals the ...
... Habit and of the Use or Disuse of Parts ; Correlated Variation ; Inheritance . Changed habits produce an inherited effect , as in the period of the flowering of plants when transported from one climate to another . With animals the ...
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accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species domestic animals doubt effects eggs embryo existing extinct extremely fact favourable female fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed tend theory tion variability variations varieties vary whilst whole wings young