On the Origin of Species by Means of Natural Selection |
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Page x
... living at any time to be the result of the gradual modification of pre - existing species , a hypothesis which , though un- proven , and sadly damaged by some of its supporters , is yet the only one to which physiology lends any counte ...
... living at any time to be the result of the gradual modification of pre - existing species , a hypothesis which , though un- proven , and sadly damaged by some of its supporters , is yet the only one to which physiology lends any counte ...
Page 7
... living species - On the state of de- velopment of ancient forms - On the succession of the same types within the same areas - Summary of preceding and present chapters , CHAPTER XI . GEOGRAPHICAL DISTRIBUTION . 273 Present distribution ...
... living species - On the state of de- velopment of ancient forms - On the succession of the same types within the same areas - Summary of preceding and present chapters , CHAPTER XI . GEOGRAPHICAL DISTRIBUTION . 273 Present distribution ...
Page 15
... living long under not very close confinement in their native country ! This is generally attributed to vitiated instincts ; but how many cultivated plants display the utmost vigour , and yet rarely or never seed ! In some few such cases ...
... living long under not very close confinement in their native country ! This is generally attributed to vitiated instincts ; but how many cultivated plants display the utmost vigour , and yet rarely or never seed ! In some few such cases ...
Page 89
... living and leaving descendants . Its descendants would probably inherit a tendency to a similar slight deviation of structure . The tubes of the corollas of the common red and incarnate clovers ( Trifo- lium pratense and incarnatum ) do ...
... living and leaving descendants . Its descendants would probably inherit a tendency to a similar slight deviation of structure . The tubes of the corollas of the common red and incarnate clovers ( Trifo- lium pratense and incarnatum ) do ...
Page 100
... living fossils ; they have endured to the present day , from hav- ing inhabited a confined area , and from having thus been exposed to less severe competition . To sum up the circumstances favourable and unfavour- able to natural ...
... living fossils ; they have endured to the present day , from hav- ing inhabited a confined area , and from having thus been exposed to less severe competition . To sum up the circumstances favourable and unfavour- able to natural ...
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Common terms and phrases
accumulated adapted affinities allied species America amount ancient animals appear become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo endemic Europe existing exterminated extinct extremely facts favourable fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ laws less living look male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring organic organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rudimentary seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation varieties vary whole widely