On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
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Page vii
... - Fertility of varieties when crossed and of their mongrel offspring not universal - Hybrids and mongrels compared independently of their fertility - Summary 245-278 CHAPTER IX . ON THE IMPERFECTION OF THE GEOLOGICAL RECORD CONTENTS . vii.
... - Fertility of varieties when crossed and of their mongrel offspring not universal - Hybrids and mongrels compared independently of their fertility - Summary 245-278 CHAPTER IX . ON THE IMPERFECTION OF THE GEOLOGICAL RECORD CONTENTS . vii.
Page 13
... offspring at a corresponding age , though sometimes earlier . In many cases this could not be otherwise : thus the inherited peculiarities in the horns of cattle could appear only in the offspring when nearly mature ; peculiarities in ...
... offspring at a corresponding age , though sometimes earlier . In many cases this could not be otherwise : thus the inherited peculiarities in the horns of cattle could appear only in the offspring when nearly mature ; peculiarities in ...
Page 14
... offspring when nearly mature ; peculiarities in the silkworm are known to appear at the corresponding caterpillar or cocoon stage . But hereditary diseases and some other facts make me believe that the rule has a wider extension , and ...
... offspring when nearly mature ; peculiarities in the silkworm are known to appear at the corresponding caterpillar or cocoon stage . But hereditary diseases and some other facts make me believe that the rule has a wider extension , and ...
Page 16
... be shown that the greyhound , bloodhound , terrier , spaniel , and bull - dog , which we all know propagate their kind so truly , were the offspring of any single species , then such facts would 16 CHAP . I. VARIATION.
... be shown that the greyhound , bloodhound , terrier , spaniel , and bull - dog , which we all know propagate their kind so truly , were the offspring of any single species , then such facts would 16 CHAP . I. VARIATION.
Page 17
Or, The Preservation of Favoured Races in the Struggle for Life Charles Darwin. offspring of any single species , then such facts would have great weight in making us doubt about the immutability of the many very closely allied natural ...
Or, The Preservation of Favoured Races in the Struggle for Life Charles Darwin. offspring of any single species , then such facts would have great weight in making us doubt about the immutability of the many very closely allied natural ...
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Common terms and phrases
accumulated adapted affinities allied species America amount analogous ancient animals appear become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo Europe existing exterminated extinct extremely facts favourable Fcap 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 less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons plants pollen present probably produced progenitor racters ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely