On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1860 - 502페이지 This is the 'second edition' of Darwin's Origin of Species. |
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3 페이지
... instance , of the woodpecker , with its feet , tail , beak , and tongue , so admirably adapted to catch insects under the bark of trees . In the case of the misseltoe , which draws its nourishment from certain trees , which has seeds ...
... instance , of the woodpecker , with its feet , tail , beak , and tongue , so admirably adapted to catch insects under the bark of trees . In the case of the misseltoe , which draws its nourishment from certain trees , which has seeds ...
9 페이지
... instances ) , yet having their reproductive system so seriously affected by un- perceived causes as to fail in acting ... instance , the rabbit and ferret kept in hutches ) , showing that their repro- ductive system has not been thus ...
... instances ) , yet having their reproductive system so seriously affected by un- perceived causes as to fail in acting ... instance , the rabbit and ferret kept in hutches ) , showing that their repro- ductive system has not been thus ...
11 페이지
... instance , I find in the domestic duck that the bones of the wing weigh less and the bones of the leg more , in proportion to the whole skeleton , than do the same bones in the wild - duck ; and I presume that this change may be safely ...
... instance , I find in the domestic duck that the bones of the wing weigh less and the bones of the leg more , in proportion to the whole skeleton , than do the same bones in the wild - duck ; and I presume that this change may be safely ...
15 페이지
... instance , of the cabbage , in very poor soil ( in which case , however , some effect would have to be attributed to the direct action of the poor soil ) , that they would to a large extent , or even wholly , revert to the wild ...
... instance , of the cabbage , in very poor soil ( in which case , however , some effect would have to be attributed to the direct action of the poor soil ) , that they would to a large extent , or even wholly , revert to the wild ...
16 페이지
... instance , it could 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.
... instance , it could 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.
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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